A mispronounciation of "bregin" originating in Guam in the 1950's by a retard named Froy Layvan (later made famous by being a subject in the experiments of Dr. Frink). Layvan tripped while saying 'bregin' and it came out 'gretchin' and thencefourth said 'gretchin' in it's place. In 1954 he was moved to the US for study where the saying caught on like wildfire.
A niche and unconventional act in which an individual engages in self-pleasure using minced garlic as a tactile or sensory component, typically while consuming or viewing content related to the Shrekfranchise, such as movies, spin-offs, or fan-made creations. The term combines the physical act with the thematic connection to Shrek.
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.