Depending on context this can mean either something, or someone who is:
1) Way far out there; extremely fucked up; an idiot OR,
2) beyond greatness; supercool; the bomb; very sexy.
EXAMPLE 1
"Here comes that dumbass, Dice'n Tyson. Man, he is MADWHACK off the track!"
EXAMPLE 2
"Yo, dawg, check it out. This station's playin' some MADWHACK remix beats tonight.
A word is used to express the impossible amount of "Whack" a certain person/place/situation/thing is; It was first used by Eloy Martinez-Aguilar when his teacher assigned 63 problems of geometry as overnight homework. The word is a pun on the name Marowak, the evolution of the Pokemon Cubone.
Justin: Dude, Peach just beat Donkey Kong!
Eloy: Fuck! Man, that is Marowhack!
Demolished, destroyed, or otherwise just plain torn up. Can be used to descried things, actions, or people. Originates from Lumberton NC, where it is a slang term from Lumbee-English.
Billy-Joe malahacked his truck when he hit a deer with it.
I’m getting malahacked tonight, it’s Friday after all
Did you malahack my research paper? Now I have to start over!