Someone who is often seen peaking while in clubs, usually on ecstacy, but can be seen to be done by hyper active 18 year old girls.
John did a couple of e's, he's a bit of a peaker these day.
by marma D September 4, 2003
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The observation of a girl's underwear, hopefully a thong, that is sticking out of their pants. If its in the back, we call 'er the regular 'peaker.' For the front, see frontal peaker
"Ooo shit man...look! look! look!...she's peakin"
"Wait for it....wait for it....PEAKER!"
"We got a lil' peakpeak I see"

R: "Any good peakers today?"
T: "Holy shit man...Sam Stickels..."
by mellin December 2, 2005
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Slang term for a opiate pain killer. Originates from Steve Smith out of Provo, Utah.
by Mick Lee July 20, 2003
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When you have to Sh!t so bad there's a little bit of it hanging out
Hey I have to go so bad its peaking, or
I have to go man, I got a peaker.
by Jim Carr March 18, 2005
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An endearing term given to a male member of the human species that enjoys the occasional sodamisation (I.e the giver of an anal act of intercourse)
Chris: I didn't know nick was gay
James: Yeah he's definitely a high peaker
by runasimpleexample1 March 5, 2012
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