yeah Daft bint is kinda a nice way of saying a silly/niave woman. Bint is a derrogatory word for a female!
Tea time is two fold- one when you have afternoon tea- around 4 with small sandwiches and cakes. Or up in the North of England they say tea for dinner. eg." going to get some fish and chips for me tea tonight!"
Does that help!?? Hmmm fish and chips! Darn it is only 9.20am!!