Top Definition
Immune to the laws of physics and incapable of independent activity, the butthumper finds your rear bumper on an open stretch of highway, and stays there. The asshole may be using you as a shield against radar, or as a fuel-mileage aid, but usually he/she is talking on the phone and relying on you to scan the road for them.
Ten lanes of superhighway to drive on and this jerk has to tailgate me. What a butthumper.
by bullshark April 01, 2008
2 more definitions
Butthumper is a good term to call a homosexual man, who likes to take it in the end, who is being an asshole!
Kyle, you are butthumper, douche bag!
by Maria Peters September 19, 2007
Butthumper, someone who is a homosexual faggot, and likes to take it in the end. Also someone who walks with their butt sticking in the air!
Garrick, you are a butthumper.
by Maria Peters September 19, 2007

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