seatjack 

to steal ones seat when they leave it for a moment

When Jenny got up to get a drink, she got seatjacked by Harry.

seatjack by YeahRealSimple February 10, 2010

seatjack 

to have a seat on a public transportation vehicle taken from the rightful person through side stepping, racing in front or hurdling

Heading home after a long day's work and was seatjacked on the number 2 train.

seatjack by nyalias81 December 4, 2010

Quack Quack Seatback

Similar to "Fives" or calling "shotgun", "Quack Quack Seatback" is a common way to lay short-term claim to a seat you're about to vacate when with a larger group. Sometimes shortened to "Quacks."

Person A: "Hey, you stole my seat."
Person B: "It's my seat now."
Person C: "No, he called Quack Quack Seatback. Move it."

Quack Quack Seatback by Joe G! January 5, 2006

Sweatjack 

(n.) derived from local Massachusetts phenomenon "Sweaty Jacky"

Refers to an attractive female, who under normal circumstances is quiet, friendly, intelligent, and charming; however, after consuming an exorbitant amount of alcohol, undergoes an "Incredible Hulk"-like metamorphosis. Symptoms commonly include sweatiness, greasiness, dead gaze, crossed eyes, hives, acne breakouts, invitations to hookup, bad breath, lack of understanding of personal bubbles, extreme urge to get others drunk, intermittent crying interspersed with dancing, and falling out of hammocks into pools.

Dude, I think I'm gonna try to hook up with Sarah tonight at the party.

No way, man! She's a total Sweatjack!

Sweatjack by TemperanceFan October 14, 2004

seatback love

action verb, the act of recieving oral sex in either a front car seat, movies, airplane, train, bus anywhere where you can recline your seat

Yo! On the way home from the party ole girl gave me some seatback love all the way to her driveway.

seatback love by Mr Corey February 22, 2009

quack quack no seat jack

Something a person says after taking another person's seat.

Person 1 - "Why'd you take my seat?"

Person 2 - "QUACK QUACK NO SEAT JACK!"

quack quack no seat jack by Zeropunctuation December 3, 2013

seatback 

When leaving a chair, you can say "I call seatback" and no one else in the room can take the seat away from you. Similar to saying, "I call shotgun" when approaching a car.

No way, you can't sit there, I called seatback!"

seatback by Jamie Kozma April 16, 2006