Not just a symbol(*). But a reference to one's sphincter, specifically the anus.

Notably used by Kurt Vonnegut in his novel Breakfast of Champions. Also appears in the Dresden Dolls song, The Kill.
The infamous Asterisk:

by Lame. January 07, 2009
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Asterisk is a hispanic slang for asshole, which is quite fun to use depending on the situation or moment it's being spoken.
You can tell about so since our assholes actually really look like an asterisk... yeah.
For instance:

Damon: Man, do you really like small ones?
Rob: Yes.
Damon: Oh great, i know this girl and i'll introd---
Rob: Because the big ones break my asterisk.
Damon: Oh for f*cks sake Rob.
by Ezuro February 19, 2015
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A symbol used to signify action when talking on IMs.
The asterisk is the * symbol.

Guy one: *cough* loser. What were you thinking? *bitch slaps*

Guy two: I don't know. Anyone could have made that mistake.
by Gibberling February 15, 2006
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A β€˜roidhead who is stupid enough to think he needs fake muscles to be good at sports.
That kid was such an asterisk I don’t even think he knew what he was doing to himself.
by allstarQB September 05, 2008
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asterisk is open source PBX software designed for the Linux operating system.

asterisk eliminates the need of buying hundreds or even thousands of dollars worth of dedicated PBX hardware.

Aside from Linux, asterisk also runs on various other operating systems, including: BSD, OS X, and now the Windows operating system using "AstWind" package.
Admin: We need a PBX for our organization, but we're kinda low on cash to buy expensive PBX hardware...

Assistant: No problem! Use asterisk, the open source Linux PBX.

Admin: I feel so stupid...
by Qbert February 02, 2005
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The word, as used here, apparently refers to the anus.
The term "asterisk" appears in the book "I'm no Saint" by Hayt, Elizabeth, in describing analingus during one of her heterosexual liaisons.
by Michael S. Goodman December 27, 2005
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A small star-shaped symbol used to denote an explanation of the word/phrase that it succeeds.

* <~~~~~~That's an asterisk.
Will: I need to shave*.

*Will is seven years old.
by Diggity Monkeez March 03, 2005
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