be as high as a kite
US /bi æz haɪ æz ə kaɪt/
UK /bi æz haɪ æz ə kaɪt/

1.
sturzbetrunken, total high
to be very drunk or under the influence of drugs
:
•
After three bottles of wine, he was as high as a kite.
Nach drei Flaschen Wein war er sturzbetrunken.
•
The partygoers were all as high as kites by midnight.
Die Partygäste waren um Mitternacht alle total high.