Informal Having a large or well-developed chest or bust.(adjective)
Informal Arrogant or proud; conceited.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "chesty" in a sentence
"Liz: Speaking of surprises, did you hear Sawyer call Lapidus "chesty"?"
"He has - he sort of has that same kind of chesty quality."
"Eric obediently hands over his wallet; the drunk friend subsides into a stupor; but Ike Marcus gets "chesty," confronting their assailants with the brave and foolhardy formula "Not tonight, my man.""