A given name mostly used in Germany and Scandinavia. If your name is Henning, you're probably extremly hot and incredibly good in bed.
Have you ever had a Henning before? No? You're missing out...
When a group of women stand or sit in a circle and a.) gossip about other women b.) talk about nonsensical and/or useless information like Bravo, shopping, celebrities or Candy Crush c.) bitch about their husbands/fiancees/boyfriends who are making fun of them for their henning practices.
"Look at our wives over there, Henning it up."
When playing hacky-sack, three people in a row kick the hack once and pass with that very kick.
If only one person does so it is a Brent.
If two people in a row Brent, it is a Douglas.
OH SHIT SON WE HENNINGED!
To sit on the toilet with clothes on prior to releasing your bowls. The point of this act is to heat the toilet seat up, like a hen sits on eggs to warm them.
1: Dude you can't shit with your pants on.
2: Dude, shut the fuck up, I'm henning.
1: AHHH FUCK, the seat's cold!
when you take a shit but dont have time to wipe, leaving you with an itchy ass crack, and upon future wipage, it transforms into a bloody henning.
Damn it man, I didn't have time to wipe this morning, I bet by 5 I'll have the worst henning.