Top definition
A bass-like sound, that sounds like any of the following:

* the sound of a pedestrian being hit by a car
* a funky bass-line
* the repetitive sound of a heartbeat

An apparel and gift company in Cambridge, MA, called "Thoomp!" was named after the onomatopoeic "thoomp" sound.
Thoomp!'s company logo (www.thoomp.com) suggests the primary definition listed here.
by Thoomp! August 18, 2009
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2
The sound of the action that occurs in the beginning of having sex.
Bro I heard you smashed Hailey .

I had too bro she was so bad, i was all in there just like thoomp!
by Silly diamond March 21, 2017
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4
To insert something in an anus. Comes from the sound created.
I'm going to ram this in your ass. Thoomp.
by Eric Thomas January 27, 2009
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