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1.
The Swedish word for "fart".
There are several words in Swedish that can be matched by the word "fart", but this one is the most common.
Jag gick och pruttade hela dagen igår, det var jätteskönt.

I was farting while walking all day yesterday, it was very nice.
by oec March 13, 2007
 
2.
A prude slut.
Any person who is flirtatious but will not put out.

"I'm so proud of you, you were so prutty!"

"We've been dating for a while, stop being a fucking prutt."
by Prutty May 16, 2010