the act of falling off of a height and landing, anus first, onto a fence post, steel rebar, or the like. the name refers to a popular dairy queen frozen treat in which a stick is stuck straight into a dallop of ice cream.
did you hear the story of the guy who jumped into a ditch full of water and dilly-barred himself on a fence post? dude now shits out of a hole in his neck.
A guy who likes to try to go after married or taken women. He gets a cheap thrill out of talking to ladies online and liking all of their Facebook posts and being super thirsty and posting lame comments on all of their photos. This is the type of guy who doesn't know what he wants but he likes to lead ladies on but they need to be in a relationship or married for him to feel good about himself like he is trying to steal another guys woman. A Dilly-bar guy also likes to post a ton of gay selfies that look the exact same for attention to feed his insecure ego. He will go as so far as to hit on his "step daughters" so basically any "forbidden" females is what gets his rocks off