Ghost stroke 

Ghost stroke(s) are when you lay on your arm until it falls asleep, and then jerk off with that same arm.

“It feels like someone else is doing it when you ghost stroke.”

Ghost stroke by Pseudonah October 1, 2018

Ghost Strokin' 

Ghost strokin' is when someone sits on or causes their hand to go numb and then uses it to masturbate with thus making it feel as if someone else is doing it.

Bro last night I was ghost strokin' so hard I came and blew a load halfway across my room!

Ghost Strokin' by OnlyElite May 28, 2017