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(n.), (v.) Stands for Just Too High. When you are so fucking HIGH that you can't take it anymore. Usually involves puking or passing out, depending on extremity and the type of high.
Dude 1: "Man, pass that blunt, you're JTH."

Dude 2: *passed out*
by WeeeeedMan March 01, 2009
An acronym for Just Too High.

(v.)(n.)(adj.) The act of getting way too damn high, so high that you throw up or pass out.
"Hey nigga, gimme that blunt, you JTH."
*Passes Out*
by Smokeyyyyyy November 10, 2008