n. a crazy person, especially someone who purports to be a scientist or inventor who has discovered the answer to some important problem facing mankind, like curing all diseases, unlimited energy, levitation, aliens, etc.

He defends his claims with the most ridiculous pseudoscientific crankisms, and claims that the government/mainstream science/experts are suppressing the truth.
Sometimes cranks are businesspeople, selling such wares as Q-ray bracelets that align your chi using q ions to give you enhanced energy.

Probably the best known internet crank is Gene Ray, for his Time Cube site.
by Khashishi May 30, 2010
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Guy 1: Bro you know that girl Sophie?
Guy 2: Yea what about her?
Guy 1: Yea she tried to bite my dick off, what a fucking crank.
by Yurbo December 2, 2021
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Crank (verb): stroke, as with a schlong; spank, such as with a monkey; lube (the chassis); beat (the cobb); wax
(tense) cranked, crankin', has cranked; "crankin' the shaft"
With big tits on my mind, I began crankin' my wang.

Since that honey wouldn't give me no trim, I cranked the shaft when I got home.
by wount November 21, 2019
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crank that bitch then supamanthat ho
by ejg1714 October 16, 2007
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A term originated from the music industry to command an individual to "turn up the volume.
Joseph: Hey man this show is going great!
Scott: Yea man but you really need to Crank it on this next song.
Joseph: Sure thing Scott!
by lyfesvrbby May 23, 2008
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someone who is a bit of a twat or annoying you
"shut up you crank"
" your boyfrind is a fucking crank"
by jogonjon February 12, 2009
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the worst song and the worst singer (soulja boy) in the history of music that sucks so bad that i question the fact that this song excists or it is an illusion of satan. in 5 years it will probably be as remembered as much the song informer by snow. youve never heard of that song?
Person A: Did you hear that new comedy song crank that ? Its so funny! I love it!

Person B: Thats an actual rap CD

Person A: I have lost all faith in the world
by hulio December 22, 2007
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