Top Definition
Someone who gets shy after smoking weed or another substance that gets you high.
Guy1: Hey, Is John coming to tonights sesh?

Guy2: Nah, he's a shyhigh.

Guy3: Hey,does John like smoking with people? I noticed he hasn't been coming over lately.

Guy4: Nah, he gets shyhigh.
by Monchan January 05, 2014
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