A socially akward fool, who is prone to putting a variety lipids (fatty oils) into his/her hair. Beware these grease squirrels they tattle on their friends, and stalk those who do not ward them off when they first meet them. More often than not they have b.o. and like ketchup.
Hey RJ, that grease squirrel thinks he has t1 armor on and wants to have a gun fight with his mayonnaise gun.
That grease squirrel took his hairy sack of potatoes he calls a girlfriend to the park to eat her bloody taco.
I saw that grease squirrel put butter in his hair again, while he was eating a frozen apple pie.