Low class Italians, generally ones who wear wife beater T-shirts, scam the system and know people in the pizza business. Houses always smell of some type of low grade Italian food.
Low guineas use an oil dip stick for shishkabobs, then return it to the car.
A derogatory term used by mentally challenged or very low IQ institutionalized males or females used to put down another mentally challenged person. Sometimes used against their careworkers. Normally used in a retallitory manner and refering to the others IQ. I personally never experienced this term outside of an institutioanlized situation. And found this was this worst verbal insult said person could use. If you are called a low grade you have not been complimented. I like to used the term in the car to prevent road rage as it is safe around children and it really helps as only I (until now) know how bad I've insulted the driver of the other vehicle.
Oh you think I'm a dummy. Well you're a low grade. Low grade, low grade, low grade!
Children you should never drive like that. It is unsafe and that person is a low grade.