A man with an abundance of joy in his pants. Men named Matt are often defined as such. Favorite positions are cowgirl and reverse cowgirl. Let the women ride until they're warm through before they hop off the saddle.
Did you see Matt the other day? Yeah he's a horny cowboy!! That girl would not get off his saddle.
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.