Going out to a bar or club alone. Usually due to having friends that are all in relationships or married. Can also be due to having friends that are always broke or never want to hang out.
I had to go lonewolfin' to college night last weekend because Bill is always broke and my former run around buddies are married.
To be interrupted during a masterbating session. Interruption can be for numerous reasons, for example: wife/gf, parents, door bell ring, phone call.
I had the house to myself on my day off. I was going to enjoy some self love but my wife came early stopping me early. She committed an act of spank robbery.