One who swoops in when your trying to seal the deal with a chick (usually a drunken slut.) Like when you turn your back to get another alcoholic beverage for her.
Darren- Fuckin Jason straight up snatchgaffed that fine piece of ass I had pretty much sealed the deal with.
Nick- I know right, Jason is a known snatchgaffer. You've gotta watch him.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.