Green’s Dictionary of Slang

no-manners n.

In phrases

do one’s no-manners (v.)

1. to defecate.

1984

C. White Life and Times of Little Richard 21: I did my no-manners [defecated] in a jar.

2. to break wind.

1984

C. White Life and Times of Little Richard 115: John would do his no-manners [break wind] and jump over and fan it all over the room.