One who enjoys the savory taste of sack in his/her mouth.
To be considered a Sack Gremlin, one must make an accumulation of sack (similar to sack hoader) that they snatched from men.
Sack Gremlins come out only at night, but they'll steal your sack right from under your weiner, so be sure to wear a cup!
Brobson is sucha fucken sack gremlin, it pisses me the fuck off!

Dude wheres my sack? Fucken Brobsen musta taken it, that fucken sack gremlin!

I hate sack gremlins becasue they steal sacks from the innocent
by Senior Weiner April 22, 2009