when something falls off your desk
that just went all whacky-woo didn't it
Something or someone that is so whack that you have to put an "i" at the end
That chick was whacki!
People are whacky when they do things that are out of the box but in a way that’s harder than they actually are.
“Did you see them cambridge peoples clothes yeah?” “ah nah mate thats whacky”
“broooo have u seen what that cambridge girl is wearing, its sooo whackyyyyyy cuz, might have to cop some”
A penis. See also tallywacker, whack off, whacky sack.
Poor kid got his whacky caught in his zipper.
Tying a noose around your neck whilst jerking off. Usually improves the quality of the meat beating process. You need to go fast or else you might suffocate and die. Most recognizably known in the move Worlds Greatest Dad with Robin Williams.
Guy 1: did you hear that Bobby died yesterday?
Guy 2: omg no what happened?!
Guy 1: he was trying to do a whacky spiderman but was too long and he died.