A verb of unknown origin which means to leave a social event without paying one's fair share of the accrued bill. Usually the offender manages to throw suspicion off his trail by paying a token amount or giving others the impression that he paid someone else. Someone proficient in HTGing can potentially save a significant amount of money, but at significant cost to their social circle.
"Man, that douche totally just HTG'd us on the bar tab."
"One time I took a prostitute home, and she was so bad that I HTG'd her while she was cleaning up in the bathroom."