Like getting castrated, but in this case you only lose one of your testicles leaving you to be half a man. Carries the added correct implication that you are now only half straight after a receiving a halfstration.
P1: Hey you know that guy Dash? Only has one ball.
P2: Must’ve gotten halfstrated. Half a man.
P1: Nah I think he had testicular cancer.
Almost being able to masturbate to something. Being in a semi-turned on state. You want to be turned on by what's in front of you but it's not quite hot enough to give you a good hard on, like a non lesbian porno.
Roger: Hey Charlie, what did you think of that new movie Jennifer's Body?
Charlie: Total garbage man. You don't even see Megan Fox nude. I could only halfsturbate to any of the good scenes where she was almost nude.
v: the process of inserting a hamster into your anus and letting him/her journey through the poop chute until finding, and eventually nibbling on the parts that cause an instant ejaculation.
---See Richard Gere