It means that "He" is not very clever, or, he is a dope, or, he is a bit slow - he is only ten pence to the shilling (of 12 pence).
Variations to this saying are many.
Also -
He is a sheep short in the top paddock.
He is not playing with a full deck (of cards).
He is a sandwich short of a picnic.
He is not the full Quid.
The lights are on, but nobody is home.
These are all expressions indicating that the subject is lacking in mental capacity or acuity.
I cannot find the term "bob in a bob" in any online slang dictionary. Perhaps you heard it wrong. A "bob" was an old term for a shilling (coin), and can be a modern slang abbreviation for "bend over buddy" or "battery operated boyfriend."
Flag. Apron is a lower class way to say flag. It is not necessarily cockney and definitely not rhyming slang. It originates in the Victorian era and used predominately by the lower class.
Garrett mean in cockney slang
Slang is slang It's the s' "LANG " uage.
It is slang for having sex.
It is worth 5 pence if you mean the English shilling
I cannot find the term "bob in a bob" in any online slang dictionary. Perhaps you heard it wrong. A "bob" was an old term for a shilling (coin), and can be a modern slang abbreviation for "bend over buddy" or "battery operated boyfriend."
There were 12 Pence in a Shilling, therefore there are 600 Pence in 50 Shillings.
Flag. Apron is a lower class way to say flag. It is not necessarily cockney and definitely not rhyming slang. It originates in the Victorian era and used predominately by the lower class.
Pence is the plural of Penny ie. 1 Penny, 2 Pence.
If you mean slang as in internet slang, then it means "Certified Old Fart".
If you are dealing with Pounds and Pence, 0.9 would indicate 90 Pence. 9 Pence would be shown as 0.09 on your calculator.
Taking the King's Shilling means that a man agreed to serve as a soldier
Garrett mean in cockney slang
If you mean value these are in general circulation; 1 pence 2 pence 5 pence 10 pence 20 pence 50 pence 1 pound 2 pound 5 pound (Quite rare to see them)
Slang is slang It's the s' "LANG " uage.
In old slang, milkshake mean butt.