A thick white substance that collects on your unsheathed dick during sexual intercourse; crab paste; dipping sauce; salmon tears.
'I was fucking some girl last night when I suddenly realised I couldn't see my cock for all the fish butter.'
by Tund March 06, 2008
Top Definition
A fish scented slimy substance secreted from a woman's crotch, made of dirt, sweat, and vaginal lubricant.
"Damn, that girl sexy as fuck but she got fish butter"
by darkjanggo June 10, 2016
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