A Grinstead is the best friend that you could ever ask for. Grinsteads are kind-hearted, caring, sweet, and loving. If you ever come across a Grinstead, they will be nice to you. It's as simple as that. They are known for being generous and taking people in when they are in need. If you are lucky enough to have a Grinstead fall in love with you, you will have someone to rely on for life.
Noun: 1. A female who is commonly known for engaging in sexual intercourse with multiple males in short periods of time. 2. A girl who is unfaithful to her boyfriend or husband.
I can't believe Sarah let Mark knock her up one night and then let Danny nail her the next night when she was going out with Terrence! What a groin hopper!
When you grind your crotch into something so furiously, the effect is equal to that of a saw. Used in the first chapter of the fanfiction HHHHHHHHHHHHHHHHHHHHHHHHHHHHHH.
"Dobby relished his groinsaw's roar as he withdrew the flesh-choked blade from the astronaut's ruinedskull."
A term used to indicate extreme pleasure with something (it could be practically anything), to the point of that something inducing the grabbing of one's genital area in a reflexive attempt at masturbation. Not necessarily literal. The term was coined by television buffoon Homer Simpson.
Fool: Wow, this Nascar race is groin-grabbingly good!