When you take a dump so epic that your head is cleared of all stupid ideas previous to said action.
Bob Saget: Dude you almost married that hooker!
Charlie Sheen: I know, good thing I took a clear-up dump.
When slinging lizards in your EMS shit box rockin a shitty rigs awareness month during the holiday season, once finished slinging your crack head to the local hospital of course, you crank the Christmas jams and purposely hold the radio microphone away from your face, so when you clear with your Satin loving dirty button pushing dispatchers, they get to hear the lovely Christmas music
“How can we piss off our dispatchers today?” “Oh imma give them the good ole Christmas Music Clear”