What is Grisby?
1.
a Grisby is a male who is extremely greasy, has problems with ulcers and usually gets an erection in the most compromising situations, such as when surrounded by straight males.
look at that Grissby over there
2.
A parasitic attachment that cleans out fridges and sweet shops, and frequently gets boners in compromising situations,
You may be a Grisby if:
1. People waste full beer cans on you at parties (I.E. throwing them at you as you throw up)
2. You get the birthday bumps when it's not your birthday, but they don't bother catching you on the way down.
3. Someone you regard as a mate suddenly beats you round the face.