noun- 1.someone who can look you in the eye and smile while telling you your a piece of shit. 2.your boss
that death vagina of a boss was such a grin fucker when she spewed her felching lies that I was inspired to jump off the closest tallest building.
by wankers against ass clowns March 20, 2009
grin fucker is like grin fucking the difference is grin fucker actually put a strategy in play and in time win the grinning contest
by sanxity June 19, 2019