Typically a form that involves deception, most commonly shoving butter into someone and spreading it like a wave to form a galaxy wave that looks like butter. Usually, this is done to anger someone and make them have trust issues for the rest of their lives.
As a prank, I decided to do the butter wave on my friend, he slipped and cracked his head open because I didn't know butter was slippery.
Weasel butter is the build up of piss that ends up on urinals, toilets, and bathroom floors. As the pee dehydrates it takes the appearence of butter.and since you leak your weasel, it's called weasel butter.
Damn there is so much weasel butter on the floor you could cook eggs on it.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.