mirrorbutt 

Mirrorbutt is the band created by Dan and Phil in their Sims 4 series. It's amazing. Buy it on iTunes.

My favorite Mirrorbutt song is their debut single: Mounted Susan.

mirrorbutt by aggressivebeeps June 13, 2016

Mirrorbating 

Jerking off to your own ass in the mirror.

Dude, one time I was mirrorbating and I busted a nut all over my towels.

What are you doing tonight? Probably just mirrorbating.

Mirrorbating by LlamaGoose April 7, 2010

mirrorbation 

Master bating to your reflection in the mirror

Cameron loves mirrorbation, he pretty much does it every night

mirrorbation by bioclassfun December 7, 2011