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a derogatory term used by mostly irish people of catholic descent to bash those of protestant descent. the protestant torture the catholics, then cry when a sniper wipes a few away.
come over here, you protty bastard! i'm gonna fuckin split yer skull open, ya cunt!
by DAN September 20, 2004
1) A Protestant; typically Irish or of Irish decent.

2) Someone whose faith is NOT Catholic or anything of the like, but an actual "Christian"

3) Christians that specifically believe in a doctrine that was Reformed from the corrupted Catholic "orthodoxy".

Antonym: Catty
If you're from Northern Ireland, you're probably a Protty; and Prottys are always being murdered by fanatic Cattys.
by Hippocrates January 17, 2013