silly sick 

Something that is super extra awesome. This awesomeness even goes beyond gnarly. Both silly and sick are adjectives in this phrase, so you know it means buisness.

Davone: that tre flip you did was silly sick!
Charlie: I know man, i've been trying for weeks.

silly sick by Elib November 11, 2006

Sally's Sick 

It's when a chick is on her period.

"This sucks, sally's sick damnit"

Sally's Sick by KiMMi June 7, 2004