comeback king 

Joe montana

'9ers down 5 with 20 seconds. Montana back to throw, hits Rice on the crossroute. Score!!!!!! Touchdooooooooown 49ers!!!!!!! The comeback king strike again!!

comeback king by fjfjjfnfsjera December 24, 2010

Comeback Kings 

A team called the Vancouver Canucks in the NHL who tends to let their opponents run up the score for the first 40 minutes of play until tearing them apart in the last 20.

2-0 Calgary Flames after the 1st period
5-0 Calgary Flames after the 2nd period
7-5 Vancouver Canucks after the 3rd period.

We are the Comeback Kings.

Comeback Kings by SJCanucks December 27, 2010

Comebacking

When you comeback from something, you are comebacking in a sense that involves magic and occasinally a llama.
But yeah, it means to comeback (in -ing form)

'2NE1, after not making music since the dinosaurs went extinct, is comebacking!'

Comebacking by DobbyTheOtter June 23, 2013