When you see a man so attractive your first thought is to get down on all fours and do it like they do on the Discovery Channel. This response is usually elicited by a man who is the epitome of masculinity.
Alternatively, a man who has Ugly Duckling Syndrome or may not be "conventionally" attractive but has an amazing personality.
Lisa: I just watched the trailer for the Wolverine movie and Hugh Jackman is beyond hot.
Gillian: True that, I'd let him stick the tip in.
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.