This expression is used when one is happy or has achieved something incredible
Tanner shouted "Blim Blam Blum" when he got head from Raphael
to foolishly rekindle a relationship that was sufficiently dead and done
"Ricky just got back with Sarah, even though after their first round it was clear that they had nothing in common other than a lust for sex"
"No way, I didn't think he would pull a blum!"