Agog - (adj) Very eager or curious to hear or see something: "I'm all agog to see the Duchess' new hat."
Bally - (adj) bloody, damned [mild explicative]: "Get that bally dog out of the kitchen!"
To be all a twitter - (v) To be anxious or excited about something: "The Mater has been all a twitter ever since Mrs. Nelson told her the news about the Duke of Edinburgh."
To be dashed - (v) To be confounded; used interchangeably with to be damned: "Well, I'll be dashed!"
To biff - (v) To strike or to punch: "If you don't remove your elbows from the table I shall biff you."
Blighter - (n) A fellow, especially one held in low esteem: "He's a silly blighter, isn't he?"
Blithering - (adj) Senselessly talkative, babbling; used chiefly as an intensive to express annoyance or contempt: "Mister Hooper, you are such a blithering idiot."
By Jove! - (interj) [used as a mild oath to express surprise or emphasis]
Chap - (n) A man or a boy.
Dash - (adv) A mild form of damn: "That was dash cunning of you."
Dashed - (adj) A mild form of damned, derived from dash: "The dashed thing doesn't work!"
Dash it all! - (interj) [used to express angry or dismay; interchangeable with damn it]
Drivel - (n) Silly nonsense; "How can you say such drivel?"
Frightful - (adj) [used for emphasis, esp. of something bad]
Frightfully - (adv) Very (used for emphasis): "I'm frightfully sorry."
To get it in the neck - (v) To be punished or criticised for something: "She really gave it to me in the neck when I arrived late for dinner."
Humdrum - (adj) Lacking variety or excitement; dull: "I don't want to go to school, Mummy, maths is so humdrum."
I say! - (interj) [used to express surprise or disgruntlement; often interchangeable with O my!]
Jolly well - (adv) very much; a phrase used for emphasis or enthusiasm: "I jolly well hope so!"
Look here! - (interj) [used to express disgruntlement or agitation with a person or persons]: "Look here, you swine! What do you think you're doing?"
Milksop - (n) A weak or ineffectual person; whimp: "Don't be such a milksop, Spencer, it's only a kitten."
Old man - (n) [term of endearment used in informal direct address]
Old thing - (n) [term of endearment used in informal direct address]
Pipped - (adj) To get the better of; defeat.
Positively - (adv) Very (used for emphasis): "How positively lovely!"
Right-o - (interj) [used to express cheerful concurrence, assent, or understanding]
Ripping - (adj) excellent, delightful: "What a positively ripping sweater you're wearing, Bernard!"
Rot - (n) nonsense [often used interjectionally]: "What rot!"
Rummy - (adj) queer, odd: "That was a rummy sort of thing to say, don't you suppose?"
To talk through one's hat - To talk nonsense; especially on a subject that one professes to be knowledgeable about but in fact is ignorant of: "He's never really met Lady Astor, he's just talking through his hat."
That's not cricket - (interj) [used to express dismay at an instance of unfair or ungentlemanly conduct or proceedings]: "Mater, Helen has taken the whole sugar dish and refuses to share. It just isn't cricket!"
Tight as an owl - (adj) drunk
Toodle-pip - (interj) good-bye, so long
What ho! - (interj) [exclamatory greeting, like saying what's up]
What? - (interj) [used as a tag question, often to solicit agreement]: "Evelyn Waugh must be the greatest author of the century, what?"
What’s-it - (n) a gadget or other thing for which the speaker does not know or has forgotten the name
With knobs on - (adv/adj) Extremely; in a similar way, but taken to an extreme: "The same to you with knobs on!"