Cheifly British: the fishy odour associated with unwashed genitalia, usually female, although the male member is arguably a closer match to the whiff of a popular packet snack sold in the UK.

Marketers became aware of this lewd association amongst teenagers and produced a viral video depicting a young man inviting his friends to sniff his fingers as 'proof' that he had been intimate with a girl at a party (although the viewer sees that he has simply been tucking into a packet of Scampi Fries). Mmmm, fish.
I reckon licking the fat one out'd be like snogging a sasquatch with a penchant for Scampi Fries.
by Ozwald Spatchcock February 5, 2009