Never, and I mean NEVER muck your cards on an opponents verbal declaration of their Hand. Keep your cards protected at all times.
Loose cash games............ Play after the flop, raise pre with QQ, KK, AA........ anything else see a flop as cheap as possible, you will still get action post flop, but you probably dont have enough money in your and all your mates bank accounts to raise enough pre flop to get rid of the suited connector and Ace rag brigade.
OI!