Side Banging 

Having an affair

John has been staying late at work every night, should I be worried.

Yeah he is totally side banging his secretary

Side Banging by passion84photography June 24, 2011

Side Banging 

Side Banging is the emo verison of head banging where instead of violently shaking the head up and down, the emo swings his head back and forth, looking as if he's saying no. Under no condition is side banging ever acceptable.

Side Banging is the queer cousin to Head Banging.

That loser thinks he's big shit cause he side bangs, but he's just a wannabe.

Side banging is the emo verison of heavy metal headbanging

Side Banging by Trollkodze Makes Me Laugh March 21, 2010

sidebagging 

When an individual removes the colostomy bag insert of another individual and has sexual penetration with that opening.

That crippled, colostomy bag wearing motherfucker pissed me off so I started sidebagging his hole.

sidebagging by lentoc August 24, 2012