When in awe of an incredibly awesome human being they are referred to as a Sick Mother Fucker.
A person is often referred to as a Sick Mother Fucker after doing or saying someting outrageous.
Person A: Hey that guy just saved a baby from a burning building while drinking a beer and having sex with a nun.
Person B: Ya, cuz he is a Sick Mother Fucker!
A horney male soldier in the field or on deployment that can/will not get sex from a female, and rolls up a sock nice and tight like a vagina and proceeds to have "relations" with it.
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.
Looking or experiencing something nice after witnessing something horrid like a disgusting gif or a disturbing video. Typically used as eye bleach are nice images of whatever makes the disturbed person happy.