Short for Vagina Stamp. Usually during or after sex, a girl leaves a wet mark by pressing her lady-parts somewhere on her partners body.
Variation, sometimes as a threat: Red Vamp, or Bloody Vamp.
"She was my kind of girl. Before I could get up she gave me a vamp on the cheek!"
"Snuggling afterwards is fine, but I could do without the massive vamp on my leg."
"Pass out early and you might wake up with a bloody vamp. Just sayin."
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