GMN was originally used in 2010 by Mashup Militia (a youtube group) to mean "Grab My Nuts". GMN is usually followed by a person saying STB
Bro: Mmmm this sandwich is delicious
Girl: Can I have a piece?
Bro: How bout GMN or GTFO!
2nd Bro: STB!
Girl: Can I have a piece?
Bro: How bout GMN or GTFO!
2nd Bro: STB!
by Mashup Militia January 12, 2011
by Mashup Militia January 11, 2011