a contraction of the word Fuck and Hug, Fug resembels a hug but is more erotic. Cloting is opptional. A fug can start out as the begining stages of sex, or it might be a hug that has slightly gone out of hand, and evedentualy results in fornication.
I escorted this random chick I met at the bar back to her place. The good-bye hug turnd into a fug and the next thing i knew we were fucking like rabbits in her kitchen!