Interbanging 

A close knit group of friends and/or co-workers who at different times have all had sex with each other.

It seems like every restaurant I work in there is always a lot of interbanging among the employees.

Interbanging by Not Shaun March 27, 2010

Interwanking 

The practise masturbating whilst using the internet to browse pornographic materials. Applies to males and females.

That guy is a creep, always in front of the computer, interwanking....

Interwanking by Astrotoy7 March 21, 2009