43
One that is a complete mistake to existence, and absolutely terrible at everything they do.
For those who play Call of Duty/other related video games:

"That guy I just knifed is an assclown."
"Get knifed, assclown."

For regular use:
"Wow, look at that guy. What an assclown."
by Kain91 April 26, 2010
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44
Noun:

1. A troll who frequents the same chat room/game room with the express intent to annoy the regulars with ilk, foul language and total disgust and rudeness. Usually said assclown will end up getting the perma-mute by everyone.

2. In general, on the society totem pole, someone who is lower than an asshole or jack ass.
Room reg: Look! Our resident assclown just came in! Everyone initialize your perma-mute button, as he's going to do nothing more than troll and flood the chat with his foul mouth and stupidity.

Oh christ, the assclown is back. Mute now to avoid feeding the troll.
by The Saucy One November 23, 2009
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45
A mear generic insult, the true meaning of this word is one that insults the person's purpose in society.
I suggest you get moving, Assclown!
by silenceisgoldie July 22, 2008
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46
clown of anal origin...
"Happy Birthday AssClown..."
by pissdursedickmom August 28, 2009
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47
A pompous and inconsiderate person suffering from illusions of importance and grandeur. This person may also exhibit general hostility toward others and display an air of genuine douche baggery if confronted. Such person may make reference to him/herself by using the third person.
Ex: The dude who drives the blindingly yellow Porsche convertible that double-parks each day in the filled to capacity parking garage is a real Ass Clown!

Ex: The dude who just spilled beer on a group of old ladies while plowing through three kids to catch that foul ball at the Royals v. Blue Jays spring training game is a real Ass Clown!
by EPWONG March 29, 2011
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48
Heres the REAL definition of assclown...
Someone that says a joke only he thinks is funny and no one laughs.
Neutron: How much for a beer?
Bartender: For you NO CHARGE HA HA HA!!!!!!!!!!!!
Neutron: ..................................... Dude ur an ASSCLOWN
by nirvvboner October 29, 2010
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49
A stupid person, one incapable of making rational decisions.
Chris acted like an assclown at his party. He talked shit and was proven wrong at every turn.
by dadaevan May 30, 2008
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