sodium polyacylate in the rather convenient form of a dinosaur.. or other creature
when placed in water grows in size as it is a polar substance
For science class we strived to create the largest gro beast by experimenting with different substances to put the lil fellas in.
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A teenage guy who looks like he is 45 and a father of 4.
Girl: Man that guy looks like my dad, no he's just a gro-man!
by San12345 December 3, 2015
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this khmer f00 that i go to sko0 with.. talks about Dick all day..
o yea n stabbed some1 i kno wit a PLASTIC SPORK!!
HAHAHAHA O SHIT REMEMBER AT LUNCH WHEN U STABBED RASCAL WIT THAT SPORK?!?!! HAHAHAHAHAA

lol gro :P
by Infamouz February 25, 2005
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An enormous ass that everybody notices at a party. All the women fall for it, and all the men are either jealous or secretly want to hit that cul as well. Some men are less discreet and tell everyone how much they lust for the Thomas Gros Cul. If you have a Thomas Gros Cul in your life, hold on tight and never let those cheeks go. Someone who has a Thomas Gros Cul might not want to admit they have such cheeks, they might even try to hide it, or ban people who mention his cul.
"Damn, did you see his ass? That's a real Thomas Gros Cul right there!"
"Shit, I kinda wanna smash..."

"Shit, is that a Thomas Gros-"
*Discord disconnection sound*
by thomass_is_fart August 13, 2020
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A man who has a huge sexy ass and every woman wants him because of that
Thomas gros cul, that ass looks good
I want to ride that, please
Thomas, how many times per week do you hit the gym?
Thomas I thinks that is genetics, I just don't believe the size

Thomas, how do you walk around with that ass
You must be lifting a lot of pallets at Maxi
I heard you are a political right winger, that must be why you have that ass
by Madame Renaud August 13, 2020
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The biggest ass in North America since 2004, after the death of Ronald Reagan, the previous owner of the biggest ass. Thomas Gros Cul is larger than Brazil and has 4 time zones. It's one of the biggest tourist destinations in the world: it has beaches, amusement parks and the Ass Canyon, a canyon larger than the Grand Canyon. It's also the home to the stadium of the Grosculville Lifters, the best NHL team ever. Thomas Gros Cul is where the Manhattan Project took place.
"Yo, have you ever been to the Thomas Gros Cul?"
"Yeah I have. I went there for my school trip!"

"Wanna hit the Thomas Gros Cul?"
"Yeah sure, let's go to the Gros Cul bars!"

There has been a terrible hurricane in Thomas Gros Cul, due to the Thomas Big Fart.
by Frozen Meat August 14, 2020
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The filthy dirty offspring of a guatemalan and a negro.
The guat-gro sat on his neighbor's porch pretending to own the house while opening his welfare check so he can buy some tampico juice. Meanwhile the guat-gro's children were stealing bikes too small for them.
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