A group that is filled with people who are complete dirt balls basically meaning they will do anything with no fucks given for anyone. This group is usually associated with dirt Ball sports such as Wrestling.
"Yo did you hear about that hoe hooking up with Jake!" "What no way he must be a part of Dirt Ball Gang! What a filth!"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.