colloquial term with multiple meanings. The two most comman usages are total opposits.
Most comman usage: positive.
cool, awesome, boss, excellent, great
Second most comman usage: negative.
Uncool, unfair, cruel, petty, uncalled-for, shameless
other usages: anything you wan't
"Dude that's so awsome" would become "Dude that's so chainpipe"
"That's just uncool" would become "that's just chainpipe"