The original purpose of cockney rhyming slang was for ‘costermongers’ (Eastend ‘barrow boys’ [selling their market produce])  to disguise what they were saying from policemen. The word "Cockney" means a ‘Cock's egg’ - i.e. something you cannot trust, like an egg laid by a cockerel.

The thing that starts with ‘H’ and means you will always be the bridesmaid and never the bride is 'halitosis'. However, it does not actually exist. It was invented by Lambert Pharmacia, the makers of Listerine, so that they could sell mouthwash. Listerine, which is named after Joseph Lister, inventor of antiseptics, was originally sold as an antiseptic, but then without changing the formula the company began selling it as a substance for washing floors, a cure for gonorrhoea, and then as a mouthwash. As it was the first ever mouthwash, they decided to invent the idea of halitosis to shift Listerine, and it worked, expanding the size of their company greatly.

The word ‘sinister’ is Latin for "left-handed". Someone who is ‘ambisinistrous’ cannot write with either hand.

Motorbikes do not pay the Congestion Charge in London because of the cameras. Motorbikes only have one licence plate, which is on the back. As a result the camera can only take a photograph of the driver from the back, so they cannot identify who the driver is.

(Motorbikes used to have a second licence plate on the mudguard, sideways on, but these were dangerous and so scrape.)

A ‘hoplophobe’ would be nervous of a ‘Sturmgewehr Vierundvierzig with a Krummlauf modification’, because it can fire over walls and around corners. A ‘hoplophobe’ is someone with a fear of weapons. The Sturmgewehr Vierundvierzig or Sturmgewehr 44 used by the Nazis during World War Two, was the first modern assault rifle, and the Krummlauf was a bent barrel with a periscope which allowed the user to shoot around corners and over walls. It was invented by a washing machine manufacturer called Hans-Joachim Shayede. Such modifications were first used by the Australians during World War One and modern versions are used by the Israeli army.

(The website urbandictionary.com defines a ‘hoplophobe’ as: "An irrational fear of weapons, generally guns, usually occurring as a result of a liberal upbringing or the fact that the person is just a wimp in general. Rather than deal with the fear said hoplophobe will assign human characteristics to a weapon i.e. 'guns are evil' or 'guns kill' to justify the fear rather than deal with the core problem of being a sissy.")