(Verb) Originating from Yorkshire, this is a slang term for the act of masturbating, or "bashing". To bash one out, means to have a good masturbating session.
by Samwiez September 27, 2010
by Don Kiddick May 26, 2004
Got excited today and then went home for a wank. I was there bashing one out when the misses walked in.
by Gavdddaa December 25, 2006