To be persistently physically and/or verbally intimidated over a period of time by someone of debatable mental health and often of monkey like appearance. Named after Mark van Bommel, dutch footballer, thug and generally insane person.
I don't buy the schmegegge about Morty sleeping with Moira.
His version of the story was pure schmegegge.
The whole schmegegge was made up to get Liz a little bit of attention.