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3.
a state of ones muscles after death frozen in one position.

Used in slang to replace the words "cool" and "sexy"
wow...robert is really rigimortis.

that is so rigimortis!

or

after death, the mouse lay rigimortis.
by Dezzy May 14, 2005
 
1.
The hardest boner you'll ever have.
Necrophiliacs go crazy over rigimortis victims due to their boners.
by cheeky_slag<3 May 22, 2009
 
2.
British slang for an erection.
"My wee wee is stricken with rigimortis"
by Brittney <3 June 01, 2007