Top Definition
when two people kiss or make out in a passionate, sloppy, animalistic manner, usually involving voluminous amounts of saliva on the areas around the mouths of both parties, with complete disregard for the people, place, or activity transpiring around them.
Joe: Did you happen to catch that little show Dave put on with that blonde chick last night?

Bill: No. What happened?

Joe: They were full on hot mouthing for a good 20 minutes in the bar. Right on the dance floor while the band was playing and people dancing around them, no less.
by the squirrelliest of all February 05, 2010

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