Grubinsky
A very unclean, dirty, & otherwise grubby person that shops for clothing & apparel on Craig's List and has a general distain for personal hygiene. Sometimes referred to as a grubby bear.
That grubinsky just paid $4 for box of used tube socks.
Grubinski
What you doing when you haven't eaten all day -- and you and some Slavic friends finally hit the evening buffet.
Man, we do some serious Grubinski and much drinking when we get to Olive Garden.