The word "Jocko" was commonly used on the London, Midland and Scottish Railway to refer to their 3F 0-6-0T shunting engines. A more common term used for them is "Jinty".
"Oi, you're taking the Jocko out today."
Spam Can is a term used on the Southern Railway and Southern Region of British Railwaus to denote a Bulleid Pacific. The name is derived from their streamlined "Air-Smooth" design making them resemble cans of spam.
"You seen the Spam Can they have at the East Lancashire Railway?"
A nickname used by British Railways staff to refer to the Ex-War Department 2-8-0 and 2-10-0 locomotives. The nickname originates from the clanking sound the engines make when in a poorly maintained condition.
"You're firing a Bed-Iron today, aren't you Pat?"
Tommy is a nickname used for British soldiers. The first recorded use is in 1743, and by 1815 it became the standard name used by the war office. It was commonly used by the French, Germans and commonwealth troops. Legend has it that if the Germans wanted to get the attention of a British soldier across no man's land, they'd shout Tommy.
"For you Tommy, the war is over!"