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1.
a stunt performed on a crotch rocket where you place your legs between your arms and over the windshield, while sitting on the tank... it feels like you are in a high chair, hence the name... dangerous to the novice...
did you see that wicked ass high chair i pulled?
de Jesters Deadd 11 novembre 2005
 
2.
One sitting on the tank of his motorcycle, with his legs over the windscreen/front cowl, and then wheelieing.
See stuntlife.com for pictures.
de Reg 17 octobre 2003
 
3.
When someone deserves to be High Fived .. in the face... with a chair.
That guy is such a jerk for cheating on me I just want to give him a sweet highchair.

That girl knocked my beer over, didn't buy me a new one and then made out with that Bro at the bar. Chick needs a Highchair.
de Zeepo 22 août 2011
 
4.
(n) a stoners favorite place to relax.
alt. pronunciation hizz' e chizz' e
Dude, I got so toasted last night that I ended up falling asleep in my high chair.
de seriously non-stoner 4 octobre 2010