igstms 

I.G.S.T.M.S (i giggled softly to myself)
when someone says something remotely funny online you usually dont lol but instead you giggle softly to your self.

FaceBook Friend:Tom farted in clas
Me: igstms

igstms by Philip94 March 20, 2011

igstsooyd 

Ima gut suck titty suck oot over yo dick
This is commonly used by those named Caleb, or Capo.

(all generally faggots.)

Caleb: YO BRO, IGSTSOOYD
Calvin: yo wtf are you talmin bout

igstsooyd by pboy234 May 23, 2022