It's normally french, but it can be placed in words, or replace parts of one. It just show a negative feel about the word or idea.
Facemoule for facebook.
Moule, I've dropped my pen again.
I'm tired with that moule-car costing me money.
(moo-l): A pre-mole skin lesion - a small flaky area on the skin, which can sometimes be confused with insect bites especially because these lesions itch. The moule stage lasts approximately 3 months.
Maybe I have a moule, a small area that I thought was a bug bite, it itches but it has been here for a while.