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coo
bill and coo
(old-fashioned) if you bill and coo with someone you love, you talk quietly to them and kiss them Usage notes: If birds bill and coo, they touch beaks and make noises to each other. (often in continuous tenses) I don't know why they bother to come out if they're going to spend all their time billing and cooing.
bill and coo
in. to kiss and cuddle. (In the manner of love birds.) Keep an eye on those kids. They aren’t going to be satisfied with billing and cooing forever, you know.
coo-coo
and cuckoo1. mod. unconscious. I socked him on the snoot and knocked him coo-coo.
2. mod. insane. How did I ever get involved in this cuckoo scheme, anyway?
bill and coo
To kiss or caress and murmur endearments.
bill and coo
To hug and kiss. A sweet old-fashioned phrase for necking, making out, smooching, or playing kissy-face—the way that courting birds touch bills and emit soft cooing noises before they get down to the real mating game.