Macaulay Culkin made a bigger mistake than "Richie Rich" when he messed with wrestling star Swoggle this week -- and now the ex-WWE superstar is hell bent on REVENGE!!!!
Remember, it was Swoggle who was targeted by Culkin at a Bar Wrestling event in L.A. on Thursday -- with Mac hitting him with a flying splash from the rope!
But now, Swoggle tells TMZ Sports ... Culkin is GONNA PAY for his transgressions.
"Macaulay Culkin ... this is pro wrestling. This is my world.