Spank Off
v. To masterbate; wank
i like to vigorously spank off.
good night spank off
using sexual gratifaction (masturbating) as a way to relieve stress or anxiousness so as to go to sleep.
Man, I was freaking out about that test last night, but then I had a good night spank off and got right to sleep.
spank one off
v. Masturbate.
He disappeared into the bathroom for 10 minutes, and I knew he'd gone to spank one off.