The term "humblebitch" refers to a shame-based response to failing to live up to non-existent standards and then vocally bitching and apologizing for the non-existent failure.
God, I'm so sorry I humblebitched on that hill. I just couldn't keep up!
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.