Chill. Adding -in to the end makes it perchin, which means fucking straight up chilling.
1.Thomas: Dude that kids a total douchebag

Dave: Nahh that kid's fuckin perch man

2. Thomas: What are you doing tonight?

Dave: Just perching at home, lets have a fucking booty call
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The act of placing your bare junk (usually male) onto the person sitting directly in front of you during class in the fashion a bird would perch onto a tree branch.
Guy 1: Yo dude, today I just lost it and started perching up on this d-bag who had been annoying me all semester.

Guy 2: Gross man.
by mmalone July 13, 2009
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alternate way to describe giving someone the middle finger.
"you want a perch? there! ya perched!!" (giving middle finger)
by the butcher September 30, 2006
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1. Acting alert in an office setting to avoid getting more work or to seem busy to others.

2. Wasting time at work while resting hands on keyboard to look busy.
"Thank God it's Friday. I've been perching at my desk all afternoon waiting for 4 o'clock."
by Pirate Fish June 4, 2009
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to have one's asshole fall out. usually said in Wisconsin. people usually perch in extreme weather conditions, like the humble winter.
by analpounder037 December 4, 2014
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When fucking a woman against the wall, one removes ones hand and the woman perches on the dick.
She was perched on my dick for a good 10 minutes!

You should have seen the bird perching on my dick last night.

I like it when she wiggles while she perches on my dick.
by Sam Kaci November 9, 2007
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