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Verb. When one transitions from a sitting position to a standing one and whatever the contents of their lap falls to the floor ( i.e. lighter, money, cell phone, keys, pills etc., etc.,) with a loud thud surprising everyone in the room including themselves occurring several times to multiple persons whilst shamelessly getting TurnT & Burnt up excessively bumping they gums not giving a fuck.
Brady just stood up and there was a lapalanche of lighters, cell phone speakers and pills all over the floor.

Dude, you just stood up and lapalanched your whole bag of dro and money, fool, now pick that shit up!
by DirTy J & ToRiNastY... January 18, 2014
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