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dried up jizz on the skin of a lady, so called because it makes the skin look scaley like a fish, and also changes the skin tone, like a tan
"suzy is a scruffy cow, i gave her a pearl necklace last night and she went to bed without getting a shower so she woke up with a fish tan"
by natrl March 25, 2010
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The crusted, scale-like coating created after blasting splang across a girl (or fellow if you're that way inclined).
Mr A: "I could barely believe my eyes! My and 3 of my mates gave her a all over fishtan"

Mr B: "Cripes!"
by squidbeak March 25, 2010
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