Love at first sight, falling in love with somebody the first time you them.
More holes than a swiss cheese, best thing since sliced bread,a hot potato,couch potato.
Hang on/hold on a minute. phrase. used for asking someone to wait for a short period of time.
He's one fry short of a Happy Meal! Somewhere there's a village missing its idiot. He's not the sharpest tool in the shed.