An acronym used to display great amusement, it stands for giggling my nuts away. It is commonly used among those on Blogtv's cool members lead by kitty1985. Other alternatives include lmto (laugh my tit's off) cmvip (chuckle my vagina into pieces) and smio (shit myself into oblivion)
Oh how humorous, Nukeboy was kicked splendidly GMNA!!