The correct expression for "firmly established" or "deeply ingrained."

This is often misheard and misspoken as "deep-seeded" by people who slur their words and pronounce a letter "t" as a "d."
Marcus has a deep-seated hatred for people who use poor grammar.
by WarOnPoorGrammar May 4, 2013
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When making reference to the Middle seat in the rear of a car, the bit with the hump that you have to perch on.
Rules for calling shotgun #8 Once shotgun has been called for the front seat then back left and back right can be called. This effectively leaves the slowest person to travel in the bitch seat.
by CPT_Pugwash May 12, 2014
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When selling bonds via BWIC, the catbird seat is the best initial bidder who will receive the best color and last look.
I'd love to trade you the bonds now, but I have to give last look to the catbird seat
by Sandwich Portfolio October 10, 2019
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Seats in a theater, usually for a live show of some sort, that are so high and far away from the stage that you get a "nosebleed" from the high altitude.
"Where were you for poker night, man?"
"Oh, man - My girlfriend dragged me to the opera! The show was horrible AND we had nosebleed seats!"
"Rough, dude."
by Nigellus November 18, 2007
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A large rounded piece of tissue paper that is designed to be placed over a toilet seat to protect the shitter from "germs" that may be residing there. The rounded section lies on top of the toilet seat (thus creating the essential Buttock-porcelain Barrier) while a cutout center flap hangs down into the toilet causing the entire paper to be sucked into the toilet when it is flushed. Seat protectors are typically contained in a dispenser on the wall of a public bathroom stall in such venues as airports and offices.
Note that the Buttock-Porcelain Barrier provided by the seat protector creates a false sense of security since someone else's bodily fluid on the toilet seat can leak right through the S.P.'s thin, porous surface. I doubt germs are foiled either.
Toilet User: Damn these seat protectors! I can't get one out of the dispenser without ripping it!

Toilet User: Ugh! Who keeps using 20 seat protectors at a time and clogging the handicap stall?
by creaternity May 16, 2006
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A person (usually a male) who sniffs people's seats to seek pleasure from the smell.
I come in after hours last night and found David being a seat sniffer and smelling the attractive female colleagues chair.
by Rubymonster April 21, 2017
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Any exterior riding area for passengers you no longer wish to keep within the confines of your vehicle - such as a dog kennel strapped to a luggage rack.
"You'd better not blow chunks or I'm making you sit in the Romney seat"

"If your crazy hoe doesn't chillax, I'm throwing her in the Romney seat..."
by stryfe August 14, 2012
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