Top definition
Stands for Ugly People Kissing. An instance of witnessing two ugly people making out or otherwise engaging in a PDA in public.
I was on the subway today and I saw two mutants getting busy with some seriously wrong UPK action. Luckily I had just gotten some take-out so I was able to use the plastic spoon to gouge out my eyes. Jebus, guys, leave that shit at home!
by Jordi Girona February 17, 2005
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