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1.
A chubby girl who if it weren't for her girth would be very attractive.
"Yo, is that chick in your Econ class cute?"
"Kinda, but she's a total chunkster."
"Who cares dude! Tap that shit."
by Robespierre Peck November 03, 2009
 
2.
one who's extreme cellulite forces you to throw up any contents you may be holding in your stomach
You're such a fucking chunkster! I wish you would stop wearing short shorts so I could have my appetite back.
by Briannica November 27, 2004