The tendency of some people to add an 'or' onto the end of their statements or questions. What's meant to come after the 'or' is up to the person being addressed
Eric: You coming out tonight or?
Mark: Or what?
Eric: Sorry, involuntary 'or' again
by snarkknight97 May 10, 2011
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A major screwup for which nobody is willing to accept the blame. The error isn't important enought to the person who made the mistake to acknowledge; however, the victim of the error suffers greatly. A meaningless apology may be offered. A prime example of Doublespeak.
"We will add your pay raise beginning next week. The paperwork was mismanaged. We apologize for this involuntary oversight.
by Vacuityofmind October 22, 2013
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Passing out face forward. When you're so drunk or bored or tired you just fall on your face. (origin: CuteWinFail)
Wedding's so boring that this guy got drunk and totally wound up involuntary planking on the dancelfoor!
by Snackface October 21, 2011
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Involuntary decapitation is where you accidentally rear-end a little old lady in her automobile and her wig flies out of the passenger's window leading you to believe her shoulder belt decapitated her.
When I saw that poor old woman's wig on the side of the road,I just knew I was going to be charged with involuntary decapitation.
by wolfbait51 April 15, 2011
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When someone has absolutely no sex life. Differs from being married, being a celibate single (e.g. a monk) or being asexual/castrated in that you want sex but no one will have it with you.
It's not my religion, it's involuntary celibacy
by mileysuckswhattednugentkicks September 23, 2013
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1.The unintentional killing of a plant, tree, flower, grass et al as a result of an omission or failure to perform an act when there is a duty to do so. 2.The killing of a plant without malice or premeditation. Not to be confused with herbicide.
Upon return from her vacation, Lauren was horrified to find that her cube foliage had become victims of involuntary plantslaughter while under the care of her Bestie.

Oh shit i forgot to water Dad's lawn when he was visiting Aunt Mary!!!! I will def be accused of involuntary plantslaughter.
by vikster2 March 29, 2011
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A form of breast reduction or removal. Usually performed by an unlicensed surgeon using a machete in a dark room with no anaesthesia.
You can watch how to perform an involuntary mastectomy on your girl if you pick up Tears of the sun.
by Solid Mantis June 14, 2018
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