On AIM, when you IM someone right when they sign on, and their buddy info still says that they've been online for only one minute. Most of the time people wait until it says 2 minutes, to avoid feeling like a stalker.
Sally: Omg Jason just signed on and I totally one-minuted him by accident!
Kristin: =-O STALKER!!
a) Time you've given yourself to shower after deciding to jerk off before an event.
b) Typically before work, meeting someone for an activity or dinner, or school.
c) Searching for the perfect porn scene typically takes precedence over getting ready on time, limiting the time to shower.
Friend 1 , "Sorry buddy, I had to rush to get ready..."
Friend 2 , "One Minute Shower huh?"
Friend 1 , "Yeah, too many good scenes."