Verb: to say a severely harshcomment to someone and offend them so badly they cannot look at you.
commonly used phrase: The smack down has been brought.
When Amar told Ned that he needed three sweaters to be sown together to make one of Ned's socks, he layed the smackdown so badly that Ned could not look at Amar for three weeks.
a hot girl with a zit smack dab in the middle of her left ass cheek that you see during sexy time
a bro at your party somehow managing to be a pussy and puke smack dab in the middle of the group smokin bowls in your room, the list goes on son, and it's often heard in Minnesota
Smack the homies ass day: Smak the homies ass day is a day on november 29th where it is legal and socially acceptable to smack your freinds ass angrily at any time.
Person 1: Hey
Person 2: *SMACKS ASS ANGRILY*
Person 1: Happy smack the homies ass day