When two males clash the tips of their penises together at simultaneous orgasm, causing the illusion of two full beer mugs being hit together causing foam to splash out.
Male#1: HEY! I think I saw Lance Armstrong riding his bike back there on the road.... I'm going to go back and try to talk to him.

Male#2: Got a man crush on lancey poo? Why don't you go beer mug with him.
by knockout9019 September 8, 2009
A mug that is used for beer.
I feel like having beer, let me get my beer mug.
by tacey January 31, 2004
A woman that has big ears that you can hold on to while getting a blow job.
I had that bitch by her beer mug ears while she sucked my cock.
by AJ19692002 November 30, 2007