U is no is when someone does/says something incredibly dumb and stupid, you with your jaw open need to say something so you would say u is no.
friend "hey dude I just fucked your mom"
me "u is no"
The act of attending class by calling another cell phone that is present in the classroom while you are not.
I bought two cellphones so my friends can take one to my classes for me. I stay in bed and call the phone in the classroom to listen to the daily lesson. I guess you could say that I'm attending cell-u-lar-versity.
A humorous way of asking someone if they like pineapple but no one gets it
Friend #1: Do u fike poneapple?
Friend #2: Huh, do u mean do I like pineapple?
Friend #1: Yee