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1.
The act of picking one's own ass and smearing the poop on another's upper lip, giving them the appearance of a Hitler mustache
Jim: You'll never guess what I did last night!

Bob: What?

Jim: You know Bill? When he was sleeping last night, I hitlered him!

Bob: What's hitlering?

(enter Bill)

Bill: What are you guys talking about? And why does the room smell like ass?

Jim:*chuckles*
by Vitamins&STDs November 21, 2009
 
2.
v. The act of trapping another in a bathroom while you defecate, thus causing your fumes to render the victim unconscious.
Person 1: What do you mean you Hitlered the baby?

Person 2: He was in the bathroom while I took a shit. I thought he was sleeping. I didn't realize I was hitlering him.

Person 1: WTF?
by xTEAMRYMAx September 20, 2009
 
3.
A prank common among guys sleeping in some kind of dorm: where the last person awake rubs shit on their finger and rubs it under their sleeping freinds nose giving them a Hitler Moustache
I kicked him out of my apartment, he kept hitler-ing me.
by psycho-punk84 February 17, 2010
 
4.
Holding your pointer finger and your middle finger to your nose making a hitler mustache and holding your arm diagonal like a nazi
Josh and Nicky were hitlering
by Nicky2244 February 13, 2014
 
5.
This word is !always! used in combination with "around" since this is an attempt to correctly translate the German expression "rumhitlern".
If someone is: extremely angry, fault-finding, arguing, running someone down, really getting worked up about something, or just generally freaking out about something, that person is hitlering around.
1. Employee A: "Hey what was that guy's problem, man ?"
Employee B: "Dunno, he was just hitlering around because we wouldn't accept his credit card."

2. Employee A: "What was that guy just hitlering around for ?"
Employee B: "Oh, because we wouldn't accept his credit card."

3. HER: "I thought we had a serious relationship! I thought you love me!? So why the hell did you... "
HIM: "Stop hitlering around - I already told you I didn't do it ! ! !"
by 83rd Inf. Reg. August 02, 2008
 
6.
When you act like Hitler. Things like Nazi Saluting, and shouting Sieg Heil. Or maybe Marching
Guy 1: Why is that guy marching around, saluting, and shouting stuff in German?

Guy 2: Ignore him... He's just Hitlering!

Weirdo: SIEG HEIL!

Guy 1+2: Umm... Stop Hitlering!!!
by Musclemouth February 05, 2009
 
7.
That is when you get done doing a girl in the ass you wipe your dick you her upper lip
would are you doing, I am hitlering you
by Jordan Hesse April 21, 2005