Top Definition
someone you hook up with but only ever see during nighttime hours. like a booty call or a fuck buddy but more consistent and/or monogamous. not quite dating-level.
X: i've been hooking up with Y for months now but we only spend time together at night. i've never even seen him/her during the day!
Z: sounds like you have a vampire boyfriend/girlfriend
by twr2938 November 01, 2009
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