Named for the motion as well as the signature Hitler mustache the motion creates, this euphemism involves an underhanded "zig heil" arm movement with an end result on your significant otherhaving a Hitler 'stache.
Said to your friends at work in an extremely roundabout way:
"While we were experimenting with the glitter sack the previous day, I am currently trying to surprise her with an Underhanded Hitler."
A crappy throw, toss, etc., where the person tossing the object misjudges the throw and completely misses the intendedrecipient, target, etc.
Lorenzo: "T-Bone, toss me a can of beer!"
T-Bone: "Here ya go!" (Throws beer 3 feet to the left of Lorenzo)
Lorenzo: "Dude, that was an Underhanded Mustard Russian if I've ever seen one!!!!! Now the beer is ruined!"
Jerking off in a public restroom stall while doing a handstand. The ejaculation must take place in less than 15 seconds after the jerking commences, and to truly perform this dead the load must be caught in the mouth of the one jerking off.
Dude I passed this girl walking through the mallyesterday. I got so hard I had to go into sprint to the restroom and pull an underhanded fastball.
when you totally, fucking, like just grab someone’s entire spine when you’re having sex, and then you rip it out and grind it up and snort it like cocaine