Hgih is High spelled backwards.
Basically its a subtle meaning of you high from weed, usually spoken with normal voice of
tone. This is mainly heard and used by high schoolers in
Texas.
Dude 1: Dude what you doing
Dude 2:
SHH! IM HGIHING FROM
ALIENS
Dude 1: Dude you high man?
Dude 3:
Omgosh dude 1 thats what it means.