Referring to either the act of sex or calculus depending on the circumstance. Sometimes purposefully ambiguous.
Guy 1: I did a lot of rigorous activities over the weekend.
Guy 2: Really?
Guy 1: Yeah, but I'm still screwed for the calc midterm.
by knitman April 01, 2009
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when someone's dead for a while and their limbs stiffen (not the penis, though if the corpse is laid face down, the flow of blood to the penis can result in an erection.. a treat for necrophiliacs)
when johnny tried to make the dead man give him a hand job, ted said "you idiot! the guy won't move! it's rigor mortis!", so then johnny killed ted and had ted finish the job before rigor mortis set in
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(v) The act of completing tasks, required or not, which have as their object the improvement of the faculties, either mental or physical. Most commonly associated with academic work, which is both required and, in the case of any serious student, has as its object the improvement of critical thinking abilities and discipline.
After Jimmy rigorized at the gym, which gave him a momentary boost to his energy and focus, he decided to rigorize in the library.

Bill was going to rigorize at the Engineering School for the night, but when he passed his fraternity, he decided to abandon his plans for rigor and imbibe alcohol. He was subsequently unable to rigorize academically for the next week, and failed out of school as a result.

Despite the sexual entreatments of his super-hot girlfriend, Jack insisted that he had to rigorize for the MCAT's that night. He was summarily dumped, but scored a 43 a couple days later, thus affirming the value of rigorizing instead of succumbing to short-term biological needs with diminishing returns.

Self improvement increases in exact proportion to the amount one rigorizes.

"'Early to bed, and early to rise, makes a man healthy, wealthy, and wise'--gee whiz,now that's a maxim, if I've ever heard one", said Trent. "Not so fast, Trent, Franklin actually got it wrong", replied Farris. "It should be 'early to bed, and early to rise, provided he desires to rigorize, shall make a man healthy, wealthy, and wise'"
by Bill Manning. February 03, 2010
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Something that is very stiff and hard to move.
It seems Stewie wee wee, has been stricken with rigor mortis.
by Tyrone November 10, 2004
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The feeling that sets in when you realize the value of your house is approaching zero.
How do you feel about the halted construction in your neighborhood?
I'm stiff with rigor mortgage.
by Robopoet February 22, 2008
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-noun
a common side effect of smoking high quality marijuana. the main symptom is loss of body control, which the brain interprets as muscle paralysis or muscle stiffening. there are two known cures: a body part must be moved/touched/pushed by an outside force, or mentally overcoming the effect with meditation.
Carl: Dude this is good weed.

Greg: I know, I can't move.

Carl: You got the Rigor Mortis!

Greg: Dude, touch me. I'm stuck!

Carl: Haha no I'm gonna go upstairs and steal your parents' personal items.

Greg: What the fuck?
by Sheet Man November 24, 2010
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