StumbleJerk 

When you jerk it to the first thing stumbleupon presents.

Yesterday, when my boss went out to lunch, I snuck into his office for a good ol' Stumblejerk. Fortunately Petsmart came up, and I was off to the races.

StumbleJerk by OlJoe November 20, 2009

Stumblejacking 

Masterbating in the dark while walking around a strange unfamiliar room, usually blind folded.

Man, I injured my knee stumblejacking lastnight!

Stumblejacking by Jasoni June 17, 2008