1. One whose stupidity and/or ineptitude exceeds the descriptive potential of both the terms ass and clown in isolation, and in so doing demands to be referred to as the conjugate of the two.
In a "no surprise" decision, Assclown President Trump was bitch slapped by the 9th District Court of Appeals and schooled in basic 5th grade civics over his Executive Order banning travel from 7 mostly Muslim countries.
by BugEyeVan February 10, 2017
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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 27, 2010
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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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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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The most common rationalization for this term is "I am not a clown made of ass, how dare you accuse me of being such!" In all reality, the term "assclown" is much deeper than one would be lead to believe.

Assclown is possibly the worst insult you could give a person, and is in most cases synonymous with "failure at life."
"Oh, hey, yeah, you see that Russian guy? Yeah, he's an assclown."

"You're an assclown, Val."
by margaretlillian April 8, 2010
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One who works in a Fusion area, and has the IQ of a pile of burning shit
SGT you are amazing stupid all because of you abortion is legal you assclown
by robert sanker March 10, 2008
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