This is a friendly gesture.
It means 'good luck'. It is usually followed by the raising of drinking glasses or tea mugs in salute to the person receiving the good luck.
For example: 'Doing your exams? Well then the best of British to you lass!'
When a British person says 'Best of British to you,' it is a phrase used to wish someone good luck or success. It is similar to saying 'Good luck' or 'All the best.' It is derived from the British phrase 'Best of British luck,' which is commonly used to encourage and support someone.
A 'doddle' in British slang means something is easy. For example: 'that essay was a doddle!'.
'Let's gave a do' is a British expression meaning 'let's have a party!' For example: 'You're engaged? Let's have a do to celebrate!'
'C of E' stands for the Church of England, which is the established Christian church in England. When a British person refers to 'C of E,' they are typically talking about this church or someone affiliated with it.
Bladdered is one of the many British slang words that means 'drunk'. For example: 'Look at Jake, he's absolutely bladdered!'
'Brassed off' is British slang meaning 'fed up'. For example: 'I am really brassed off with all this homework!'
If someone says that they validate you as a person, they mean that they consider you to be a worthwhile person.
You mean 'C of E'. This is commonly used to refer to the Church of England. For example: 'The C of E is bankrupt again'.
This probably isn't what you think it is. A cock up in British slang means 'a mistake'. For example: 'I made a total cock up of that pie!'
'That's beastly' in British slang means something or someone is nasty or unpleasant. For example: 'Shaun is a rather beastly fellow!' or 'that smells incredibly beastly!'
They are not imitating a bomb, so you can put the phone to the police down. 'Blast' is a British exclamation of surprise or 'oh dear!' For example: 'Oh blast I left the bath running!'
It means that you are a nice person.
Stop being a mean person.