The act of a pre-emptive flush of the toilet BEFORE sitting down. Normally to ensure that the toilet will flush when needed and not back up. Usually performed when expecting a turd on exceptional volume and density, such as a bowl winder.
After that last bowl of chili, I decided to use a safety flush before I dropped a payload.
Piece of cloth or clothing used to wipe the jism off one's belly after masturbating. Generally unwashed and stored under the bed, the foul towel develops an ungodly odor and becomes rigid after several uses. May be able to stand on it's own with enough use. Often used by a towel wanker. See also wank towel or gak towel.
I ran out of tissues, so I had to use my shirt as a foul towel.