The substance which makes a newly caught fish slippery.
"You talked me into wearin' panty hose, you talked me into tickling that policeman, you talked me into drinkin' fish grease..."
by The Mole October 23, 2004
to be really fly or hot. also to be ballin.
" I AM FISH GREASE, WAT DAT MEAN?? IM REALLY HOT..." - PLIES
by HYPE MAN 180 February 20, 2010