Top Definition
a) The act, or acts, of firing a semiautomatic weapon rapidly while submersed completely underwater. The method of engaging fish from the CQB ready to offhand stance.

b) To destroy one's private property in a rash manner while shooting underwater "To aquabump"........
"I was aquabumping off the hip twenty feet down when my AR exploded for some unknown reason......"
by J_Smith March 29, 2005

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