My toddler's new favorite word is "yeah." As in, if I ask her if she wants a cracker, she'll say, "Yeah."
I remember a while back, I was at some playground and I heard a mom scolding her son for saying "yeah." She instructed him, "Say yes."
I feel like I have better uses for my time than forcing my one-year-old to say "yes" instead of "yeah." But still, it's pretty funny when she says it.
Me: "I don't understand why she always says 'yeah'."
Husband: "It's because we always say 'yeah', that's why."
Me: "No, we don't."
Husband: "Well, what's a situation where we'd say 'yes' instead of 'yeah'?"
Me: "Like, if someone asked you if you were a God, you'd say yes."
Me: "What?! It's true!"
(If you don't know what movie I'm referencing, this punch line will make absolutely no sense to you.)