1) The act of having to leave one's present location (house, apartment, yacht, etc) during a social gathering so as to acquire more beer. This typically occurs when the previous supply of beer has run dry, thus necessitating the need to "run out and get some more beer," i.e. "beer run."
2) Term used by underage kids for grabbing beer and running out of the store with it. This is a misuse of the term, as the preferred nomenclature is "shoplifting."
(1) A sexually aggressive lesbian. A lesbian who makes unwanted sexual advances.
(2) A female mole which is also gay.
(1) Candy: I didn't wanna say anything, but... is Mandy gay?
Andy: Uh, yeah. Duh.
Candy: OMG. That's cool if she is, but I'm totally not, and she was grabbing my butt all night.
Andy: Ohh.... right. Sorry. She's also a molesbian.
(2) Freddy: Aww, you have two pet moles! How cute!
Teddy: I think we can all see where this is going.