A Work Wank
A work wank is when you jerk off at work because you're too lazy, too bored, or too distracted by the hot new receptionist to do anything else.
I had a work wank because my boss was being a cunt and I was too tired to fight back.
I did a work wank because my computer froze and I had nothing else to do.
I had a work wank because I saw the new guy in accounting and I couldn’t take it anymore.