The longtime power couple of comics, Superman and Lois Lane, are calling it quits.

FORBES: Superman And Lois Lane Break Up

For these and other reasons, some American citizens and U.S. permanent residents are calling it quits.

FORBES: Tax Expatriates: We'll Always Have Paris

Brett Favre spent time with the New York Jets and Minnesota Vikings before calling it quits.

FORBES: Peyton Manning And The Colts To Part Ways Wednesday

So bruising was the 1969-70 stock market downturn that Jones himself considered calling it quits.

FORBES

Just a year ago, quite a few dairy farmers were calling it quits.

NPR: Milk Costs Surge Due to Corn

Sony may be struggling, but the company and its PlayStation brand are a long ways from calling it quits.

FORBES: Time To End All This Doom And Gloom Over Sony And The PlayStation

Pop diva Jennifer Lopez and backup dancer Chris Judd managed to make it to only the eight-month mark before calling it quits.

FORBES: Magazine Article

While many congressional Democrats are facing the likelihood theyll soon be forced out of their jobs, a number of White House insiders are calling it quits voluntarily.

NPR: The Pressures Of Working In The White House

Yankees manager Joe Torre is calling it quits.

NPR: Mukasey Questioned on Torture