McThingy Share definition Flag Of or pertaining to an Irish man's abnormally small penis. Usually a Leprechauns Hey Steve doesn't that guy in the green have a McThingy?LET THE WIND BLOW THROUGH MY MCTHINGY!!! McThingy by OG x Commando October 20, 2010 0 0 Get merch Get the McThingy mug. Buy Now — $32.95 See more merch
