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Noun. A ranceur is a person who you can not count on or get a hold of. A ranceur is also someone who is frequently late or does not show up to an event/place, even when saying they will do so. Rance can also be added to someones name if they are a certified ranceur
Calvin: Where's Nick?
Bob: I don't know, he ranced.

Calvin: Dude, meet me at 6 oclock, don't rance
Nick: kk

Calvin: I told Nick to pick me up food
Bob: Why, he's a ranceur

Ohhhh! What's up Nick-Rance!
Ranceur by TonyTonz January 16, 2017
While this word also refers to the beast in Star Wars that lived underneath Jaba The Hut's palace and ate Jedi's, it also happens to be a derogatory term for people who have large appetites, are abnormally cranky, are scared of doors, and are named Courtney.
1) Did you eat that whole pizza!? You're such a Rancor!

2) Stop over reacting! Bad Rancor!

3) Watch out for that door, you Rancor!
Rancor by The George Lucas February 7, 2010

Rancourt 

The life of the party, no one knows exactly how wild he can be till he is in the middle of a party.
"Dude the kid who sits behind me in one of my classes is a complete Rancourt!"

battle the rancor

V. - the act of having a particulalry tough time moving one's bowels. Usually accompanied by loud moans and/or the cursing of whatever may have caused such a strenous time on the porcelain throne. A reference to the Star Wars film, Return of the Jedi, where Luke Skywalker battles a giant shit monster in a cave that looks like Jabba the Hut's toilet.
I had some bomb ass tacos yesterday, but when I got home I had to run for the toilet and battle the rancor.
battle the rancor by lousixx August 20, 2011
The beast under Jaba's palace in Star Wars. This is also used as a term used to describe girls that are lesbian, fat, ugly and/or have more hair on their face than the average teenager.
"Look at that girl... ewww!"
"Wasn't she in Shane's summer school"
"Rancor!!!!!" *runs away screaming and gets gored to bits*
rancor by rancor h8er September 22, 2010
A rowdy sex position where a naked bro is being chased by a naked babe. In order to stop the chase the bro has to force his bone down her throat, choking her until she moans like a dying rancor.
Hey man, I totally did the Rancor with this chick last night!" *High fives* "That's tight, is she okay?" "Nah man, the trials actually next week." "Ah.
Rancor by Sex Jedi November 28, 2010