... I just met her!
An old standby from the original MSTK Caption This site. Basically anything that ends in E-R, such as "Poker", a certain capper would follow with something like: "Poker? I just met her". After a few of those, he would get KLUNKED halfway through. He learned to duck, though and would spring it at an unsuspecting public. Another variation of this running gag is "...I hardly even knew 'er!".
Note, this is essentaily the same gag as the age old "I just picked up a hitchhiker from Maine" joke.