when attempting intercourse you mistaken put your penis in a woman's ass intead of her vagina.
"Hey man, last night was so crazy! I was getting it on with Melissa and I went to stick it in but I got lost in the bushes and ended up down a dirt road."
"What did she say to that?"
"All she said was, 'Wrong hole but keeping going'!"
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.