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If a person is in the sitting position and needs to elevate themselves they can use fecal matter to help. A person must excrete fecal matter in the sitting position and it causes the person to rise in the seat. The booster seat often causes a squirming sensation.
I went on a dinner date, the girl was taller than me do I had to give myself a booster seat.
by Teamcletus September 06, 2018
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2
A sex act in which a man will recline the drivers seat of a car, then a woman (or another man, if thats how you roll) will proceed to get on top of said man and drive while engaging in the act of sex."
"Dude is that a sling for your cock?"

Ya, we got rear ended while doing the booster seat, no pun intended."

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by YouSick&$#@ March 17, 2010
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3
A guy with a huge ass which is disproportional to the rest of his body.
All the girls love Jordan because he has a booster seat.
by da black flame July 03, 2008
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4
Where you sit on top of another person and shit between their legs into the toilet
"no doors on this stall? Well looks like I may need to be a booster seat today"
by Parale March 06, 2019
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5
booster seat means short...like how a baby needs to use a booster seat
Girl 1: yo did u see isaac he’s rly short

Girl 2: yea bro he a booster seat
by someonethathatessomeone February 16, 2019
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