Another term used to describe Diarrhea.
Dude, my stomach hurts so bad from that Chinese food last night, I had sick ass when I woke up this morning.
by ThisGuy3044 July 2, 2021
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to tell someone that they are crazy (in a good way)
ROGER: "man i hooked up with like 4 girls at that party lasy night!! you should have been there!!"

PAUL: "fuckin roger!! your a sick ass foo!!!"
by paulbbj April 13, 2007
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Usually a guy who is good at sports, drinking, partying, and pleasing the opposite gender. These guys are a special breed of guy that can only be found in the 951. There is a group of friends who coined themselves as THEE Sick Ass Dudes
person 1: "that guy is badass!"
person 2: "yeah, he's a sick ass dude"
person 1: "oh for reals? No wonder!"
by Cubeta November 1, 2007
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More often than not, it is used in a derogatory manner. Can also be a term of endearment. Personally I mostly say it when someone tells me they did something I have no interest in.
Negative
"This is my first definition on Urban Dictionary!"
"Sick ass fool...."

Positive
"Dood I just got a keg!"
"SICK ASS FOOL!"
by slompythepirate July 3, 2013
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Anybody named Nick who sells 1 gram cartridges of "wax" but it's really vape juice for 45 to dumb lil niggas and beat them up when they want their money back.
"Oh shit you know Nick"
"Hell yeah! He's a SICK ASS FOOL"
by imasickassfoo August 31, 2018
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