Crack cocaine; Specifically, individual crack rocks.
Used extensively in rhymes by rapper MF DOOM.
"Villain man never ran with krills in his hand, and
Won't stop rockin' till he clocked in a gazillion grand."
- MF DOOM, Gazillion Ear
"Instead, she wants to hear the beatbox
Take pills and make fake krills that's sheetrocks."
- MF DOOM, Vomitspit
"We hollow krills, she swallow pills
He follow flea collar three dollar bills."
- MF DOOM, Beef Rap
"Never seen the shit again, but he's still my dunny
Only thing that come between us is krill and money."
- MF DOOM, Rhymes Like Dimes
"Don't smoke krill, won't need Topol
If the flouride don't kill you, then the soap will."
- Viktor Vaughn (MF DOOM), Dope Skill