mucking ass 

Kicking someone's ass in a giant nerf gun war.

"Lauren is really mucking ass in this nerf war against Patrick!"

mucking ass by InfiniteWisdom420 December 30, 2016

macking ass 

A statement to acknowledge someone being flirtatious, a possible sexual situation; or compliment good looks. Could also be used a joke to note a completely platonic situation being one where the parties had devious sexual thoughts.

"Wasif is macking ass. Never chin chillin ass."

"Katass is always macking ass, never chin chillin ass."

"You're macking ass today."

"Damnnnnn, macking asss bro!"

macking ass by Never chin chillin January 21, 2009