A cuda (used "y'cuda" when calling someone one) is someone who mindlessly and instinctively follows trends, regardless of how dumb the trends are. This kind of behavior is both incredibly irritating and prevalent in 2017 culture.
The word stems from an analogy made by Chris D'Elia on his podcast Congratulations where he compares people who go to events like Coachella as being like Barracuda's, fish that just blindly follow the crowd.
Oh, you go to Burning Man and camp out for a week in the middle of the desert and dress like a fairy? Y'cuda and frankly, y'lost...S'whatyare.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).