Walking, hiking, crawling, or climbing through an ancient lava tube which is now free of lava flow, such as Ape Cave at Mount St. Helens. Probably involves the use of headlamps or flashlights.
Guy 1: "Hey man, what did you do this weekend?"
Guy 2: "Went lavatubing. It was awesome, I got cave bacteria all over my hands."
by anthroubc2010 October 1, 2010
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Lavatube Noun/Verb
/lävət(y)o͞ob/
When a male has sexual relations with a woman for a long period of time (2 or more hours) the vagina becomes heated, thus creating a Lavatube, occasionally leaving male genitalia with blisters and sores.
Noun: "Bro I was going at it so hard her Lavatube burned my dick!"
Verb: "Make sure not to go at if for too long or she might Lavatube your dick!"
by Apeirophobia July 1, 2016
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