1.Means to Be cool, Stunnin',fresh,raw,da hot shit.
2.Also mean shigh class,fresha den a muthafucka.
Dat Nigga boosin' bra
Dat shit boosin'
Damn put some 28's on dat n she gone be boosin'
by Everette Greene, Mikhail Grinnell September 19, 2007
"Ah, shit, man.. You boosined."
by Xx-Gayness-xX September 15, 2018
To ride a mountain bike downhill in a fast and aggressive manner.

Similar meaning to pinned or shred
"Yeah i was boosin' it down that trail"

"You see that guy hit that gnarly section? he was boosin'"
by Vertigo666 November 21, 2018