Noun.
History: Believed to be a Gallagher-ism (American comic of 1980s & 1990s known mostly for pulverizing melons w/a huge slegehammer in his shows).
Definition: Those wisp-thin, slightly waxy paper toilet seat covers offered in public toilets to protect one's bodunkadunk from coming in contact with someone else's funk.

A paper toilet seat cover.

Also called a Texas t-shirt or a Portagee pegnoir.

This expression was common in the 1950s, and long time before the Gallagher was born. It's probably much older than that.

N. The toilet seat covers commonly found in public restrooms.

paper toilet seat covers used to protect your ass from un-sanitary restroom conditions, such as splatter, shrapnel, coat the bowl and peeing out of my butt. it provides a nice, clean seal between your bum and the nasty toilet seat during those times when you just have to go.

Paper toilet seat covers

Noun: A reinforced rectal barrier which acts to contain the repressed or suppressed anger one experiences during periods of intense frustration usually encountered during interactions with stupid or socially dysfunctional persons.

Also: The part that needs fixing when someone inadvertently lets one loose.