Said or written to a deceased person on his or her birthday in order to convey the good wishes of the speaker or writer.

plural of happy-go-lucky

Uncommon form of happy belated birthday.

The Chinese ideogrammic compound 囍, often used as an ornamental symbol in Chinese celebrations.

(informal) many happy returns

The quality of being trigger-happy.

Happiness or contentment, especially as the elusive object of a quest or as a state of affairs which is difficult to achieve.

Alternative form of happy as a clam

A group of people who get along well together.

(sarcastic) Said to scold someone who did something wrong, after seeing the consequences.