Scott:Lil E was soooo slow on the track today.
Bob: Well I sure he finished in front of the two girls he was racing against.
Scott: Sorry dog.... he was DMFL!!
Similar to a tit fuck but in a d-mack the tits are replaced with the receiver's ass cheeks. Coating the ass with male ejaculate is considered par for the course.
(adj.) Prounounced Dee-Dee-Dee this description of one who is stupid or has just committed an assinine act commonly includes the hand motion of a curved hand hittting your chest at the same time as you say each "D" it is almost always an insult