Jack Off Machine... The abbreviation can be used for people named Jon or Jonathan to form the name Jom or Jomathan. It can also be used as an adjective to describe someone's jommishness.
Ex. 1 - Jommerthan Frankfarter is a real J.O.M. The cleaning lady was really freaked out last night when she found his jommin rags under the desk. SICK...
Ex. 2 - Ooh, yeah! All right!
I wanna jom it wid you.
We're jommin', jommin',
And I hope you like jommin', too.