P.U. - Puzzle for U

Good time at chess club tonight, met some new people, but... I did make one of the worst blunders I've ever played in a slow game, short of missing a checkmate. 

I am probably going to lay off posting my full game reviews for a bit, but here is the gruesome bit from tonight as a puzzle. Black has just played Bc5. Find the best move or try to guess my crappy one!