Today's BWOTD is one of my fave phrases and a 2-parter:
"You are such a jammy git!"
'Jammy' = lucky
'Git' = is kind of a slightly insulting but friendly term for a person!
Hard to define but you would use it if somebody had won the lottery, or won a Plasma TV in a competition for example. So a 'jammy git' would be a term you would use if a friend had won something great, you were slightly jealous but still pleased for them. If I happen to say this to you there is no reason to be insulted - honest!
'Git' does not mean 'get along' like it does in the USA, so careful how you use it when around a Brit'....LOL!