An acronym for Go Die And Burn In Hell. Should only be used in text speak, If you are so lazy that you actually say G-D-A-B-I-H then the insult has just failed.
Person 1 - *Cried*
(Later that day)
Person 1 - *Texts Friend* That guy just told me to GDABIH and I cried...
Person 2 - Man up