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"Have you seen that cancerous fuck named Caustic"
"No...Oh shit hes right behind you!"
Caustic:"yeet bitch get gassed!"
by Apex Boi March 25, 2019
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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Corrosive and burning, but also interchangable for the word awesome.
"Man, when that shopping cart hit that wino, that was caustic"

"I went to this caustic party downtown, but then someone got stabbed"

"Sally is pretty caustic, when she's not hanging out with that pilgrim Luke"
by CapriceFidelity August 02, 2004
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Burning, Corosive.
No one was safe when the satirist H.L. Mencken unleashed his caustic wit.
by LarstaiT November 10, 2003
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capable of eating tissue paper
Sally: I saw Johnny eating some tissue paper.
Sue: Wow! He must be caustic!
by Verna N. September 30, 2006
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