When defacating, the act of cutting short your faeces before you are finished, usually due to interuption.
"dude, yesterday I was dropping a hot steamy log and just as I was getting to the thick of it the UPS guy arrived and I had to lumberjack it!"
"there's two hobos fighting outside?! I'll be right there! I'm lumberjacking it!"
"there's two hobos fighting outside?! I'll be right there! I'm lumberjacking it!"
by Guyxander August 18, 2009