4 betting a squeeze pre flop

a squeeze play is where someone open raises, usually in late position, gets one caller, and someone else comes over the top with a big reraise. the squeezer is relying on you being weak, as he thinks you would open raise with many hands in later positions, and so can pull this move with almost any two cards. he is putting pressure on the initial raiser to fold. he doesnt expect the other caller to call his reraise as if the caller had a good hand he would probably have reraised himself. of course the squeezer isnt always doing this with a weak holding. but it is a good move to pick up a lot of dead money.

as a defence against squeeze plays repoping with a strong hand (when you are the initial raiser) can often take down a nice pot without even seeing a flop. here are two examples:

i get squeezed with AK on button and repop

i get squeezed with AJh on button and repop