When you observe either an appearance or a behavior of someone that really bothers you and you can't quite find the right word to describe this annoyance - Calling some a Muopsies (adjective) or naming someone a Muopsies (noun) is a combination of all of the derrogatory words you were thinking of into one.....perfect.....word
That Muopsies wearing the striped shirt is holla'in at your girl!!
Don't be such a Muopsies Jones.
Only a real Muopsies would not drink this liter of vodka.