happy birthday
- said or written to a person who is celebrating his or her birthday in order to convey the good wishes of the speaker or writer
Wiktionary
Pronunciation: /ˈhæp.i ˈbɜːθ.deɪ/ / /ˈhæp.i ˈbɝθˌdeɪ/
intj
- Said or written to a person who is celebrating their birthday in order to convey the good wishes of the speaker or writer (literally, "may you have a happy birthday")
“Happy birthday, Joe! Have a fantastic day!”
verb
- To wish (someone) a happy birthday.
“Everybody was happy birthdaying him the full day.”