Euphemism for taking a shit. Often used in a business or formal setting to explain a prolonged bathroom break while maintaining a professional appearance.
Sorry I'm late, but I had to send a fax to Cleveland and it was several pages long.
A way of politely saying you are going to be going to the lavatory to take a shit. Became popular in Zimbabwe around the turn of the millennia, and has been household saying ever since.
"That meal was amazing, but now I need to send a fax to mugabe."
"Make sure you send a fax to mugabe before we leave because we are not stopping the car on our way down south."