To be so totally clueless as to not know where you are or where you are going when high on drugs... This can be brief or for some time.
Etymology: Where The Fuq aM I
I waz drivin back 2 ma crib along the usual path afta takin sum of dem mystery pillz, when all of a sudden i experienced a WTFMI moment... I did not kno wat road i waz on or where i waz goin .