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An internal meter, usually located within female but also has been found in males, that measures the assholeness of someone, usually upon the first meeting.
Gal: I just met the hottest guy at the bar, but my assometer read a "9." Run like hell!
by Homophoniphobic March 17, 2010
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A meter measurement of the quality, and sometimes quantity, of a female butt. A meter that reads units of the 0-10 rating system.
1st. Guy: "Lordy! Look at that fine butt on that woman! That will measure a nine on the assometer!"
2nd. Guy: "It is fine indeed, but my assometer reads only an eight!"
by copter32 July 28, 2008
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