When a guy starts hooking up with his girlfriend and gets a boner, but then his girlfriend gets up and wants to leave immediately, so he is stuck with a boner and doesn't want to stand up right away...this is an appropriate time to boner stall
Lucy: Okay John let's go. I have to be home in 5 minutes.
John: Lucy just hang on a second
Lucy: Why? Do you have a boner or something?
John was doing some BonerStalling