In trading, when you get a better price than expected or
using fecal matter as lubricant
Awesome trade and I got dirty slippage
by harder faster May 13, 2011
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When the lips of a woman's vagina slip past whatever she is wearing, exposing them to the world.
Brenda was in yoga class when the woman in front of her bent over and experienced lippage slippage.
by George Oscar Bluth January 2, 2008
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to feel someone up or or engage in foreplay with the hands.
"I totally got my finger slippage on with that girl last night in the club"

Jon: "How'd that date go last night?"
Jeff: "Pretty good, we didn't bang, but I got some finger slippage in."
by dontgiveashittt January 3, 2011
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When you cover a public toilet seat with TP, and turn around to sit down & your shorts/pants/dress knock that nice later of ass protection off the seat and into the water. Inevitably, you have to start over.
Man, I had to drop a deuce, but the seat was so nasty I had to use 3 well-placed layers of TP to protect my booty. I turned around to sit down, and there was massive TP slippage, and I had to start all over.
by rotospace July 2, 2015
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a work colleague who consistantly rolls in later and later to work with no redress
"Piss Slippage" is a noun used to describe a person (a colleague) usually of Irish extraction who consistently rolls in to work later and later much to the annoyance of their colleagues
by T to the L June 23, 2011
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When too many items on a sandwich such as tomatoes, lettuce and mayo cause the meat to slide off the sandwich resulting in total sandwich destruction.
Todd bites into his sandwich, the meat falls out the back and the remainder of the sandwich crumbles in his hands.

Frank-"Woah! tectonic meat slippage. Better get a fork, Todd"
by killersbytrade January 31, 2010
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the act of two people dry humping but in order to get more satisfaction the girl makes sure she isnt wearing panties. She then lines her clitorium up with the seam of the denim jeans that she is wearing to enhance her dry humping experience.
Catherine made sure that she had a good, hard denim seam before she started dry humping on seam slippage with Brad.
by millenium passions February 17, 2012
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