Green’s Dictionary of Slang

1. (UK Und.) the penis.

1846

Swell’s Night Guide 108/1: Agitator, see pego, life plant.

2. a bell-pull, a door-knocker.

1889–90		Barrère & Leland Dict. of Sl., Jargon and Cant.
1890–1904		Farmer & Henley Sl. and Its Analogues.