Top Definition
1. a boyfriend who is alot older than you, but not quite old enough to be your dad

e.g. a 22 year old dating a 36 year old

2. Usually used to in the situation when you are unsure as to whether the person in question is a boyfriend or an uncle

3. The male version of a cougar
"No way ... That's her boyfriend? I thought he was her uncle"
"Yeah, he's totally an uncle boyfriend'
by No1 Greg Hater October 26, 2009
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