dropping timber
Having a bowel movement.
James can't come to the phone right now. He's in the loo "dropping timber". I'll tell him you called, Tootsieman. Latah!
Drop some Timber
The act of taking a shit.
Yo! I will be back. Im gonna drop some timber. Aight!
drop off some timber
A slang term meaning to use the restroom to defacate.
"Hey, do you know where the crapper is? I need to drop off some timber."