Can someone tell me what "that could" means here?

It means something akin to being able to or having the confidence to do something, it was made famous in a children's book called "The Little Engine That Could" about a train that puts in all of his effort to climb a big hill and because he believes in himself he succeeds. That connotation carries to this usage.

It's a reference to a childrens' book, "The Little Engine That Could." It's supposed to be a demeaning comment because girls = childish and bad. (I approve of your movie choices)

It’s a reference to a famous folktale (turned into children’s book): [*The Little Engine That Could*](https://en.wikipedia.org/wiki/The_Little_Engine_That_Could). In the story, a little train managed to pull a larger train up a mountain through hard work and perseverance. Generally, as an idiom, “the little [noun] that could” means “the [noun] that was/is/will be successful against expectations.” The understood tense of “could” depends on context. So, here, it means “the girl fight club that was successful.” What precisely that means requires more context.

This is probably a reference to the children’s book “The Little Engine That Could”. It isn’t a grammatically accurate sentence. The book is about a small train engine trying to move up a big hill and telling himself “I think I can, I think I can” until he could, in fact, get to the top of the hill, making him the Little Engine that Could [achieve his goal]. I’m not familiar with the movie or show in the picture, so I’m not sure if they’re insulting the listener (by calling them “little girls”) or encouraging them by referencing the story.

"The little \_\_ that could" is a reference to a children's story, called The Little Engine That Could. The story follows an anthropomorphic train engine that has to pull freight over a large mountain, and says 'I think I can' over and over as it climbs the mountain. It's basically a story that tries to teach optimism and hard work. In this case, it seems as though he's trying to talk about the optimism and hard work of a fight club featuring little girls.

It means the same thing as it normally does, except in this case they haven’t added what the little girl fight club could do. You as the viewer are supposed to interpret what it can do from what they have previously mentioned about it.  A famous example of this is the children’s book “The Little Engine That Could” where it’s not exactly clear what the engine can do, and you as the reader don’t know what it can do.  It’s not something you’ll hear that often, so don’t worry too much about it, and if you have any further questions then please ask! :)

There's a famous children's story about an anthropomorphized train engine that accomplishes the task of getting up a difficult hill through the power of perseverance and self-motivation. The story is called "The Little Engine That Could". What you've shared appears to be a play on that. He's suggesting that this is a story about perseverance.

It means, sweet Jesus, I feel old now.

"The little [thing] that could" is a phrase that is referencing an old folk tale that later became a children's story "The little engine that could" and "Thomas the tank engine"

BOTTOMS MENTIONED!!

You would need to tell us the rest of the sentence so we could put it in context.

It's a play on words from an American folktale, *"The Little Engine That Could".* (https://en.m.wikipedia.org/wiki/The_Little_Engine_That_Could) Any phrase that is like "little /something/ that could" is usually referring to this story, and describes something that is more capable of doing things that other people thought would be impossible to do, especially for the thing/person attempting to do it.

Something like “they thought they could do ___, and they tried really hard, and they succeeded” But also slightly patronizing. “Aww, they tried *so hard*”

For some reason my first instinct was that it was from Thomas the Tank Engine, but I was just conflating it with a different blue locomotive from a children’s story. It’s part of the iconic epithet in the title of the children’s story “The Little Engine That Could.” And at least in American culture, it’s come to mean (sincerely or otherwise) someone or something has beaten the odds and persevered. I haven’t seen this movie, but I’m betting given the trailers I’ve seen that in this instance it’s 100% on the insincere, rather mocking end of the scale haha

Probably a reference to the children‘s book "The Little Engine that Could" where if I remember right, a little train gets up a mountain with determination. In general, this is referenced in an endearing way but could also be condescending. I don‘t know the context.