A Mellas Smlake party is when you travel to a European country to jump in a lake of ice water with a bunch of old dudes while intoxicated to shrink your penis to baby size then get out and laugh at each other.
Darnell: Yo, I heard Matty be doing some weird vacation!
Uncle Dan: Yep, he wildin in Poland. A damn Mellas Smlake party.......damn.