When two men greet each other by feeling up or groping their bulges.
"Yeah man, Eric and I are so close that we Smen-Thrumpen."- Brandon said to Brian.
Brain replied in a shocked tone- "SMEN-THRUMPEN?! You mean you two grab on each other's dicks in greeting?!"
"Exactly that, we both grip and massage our junks. That's how I know he's MY ride-or-die."- Brandon replied in a smug tone, knowing that Brian would get jealous of his close relationship with Eric.