In your cups
Definition 1 of 1
Pro Tip 1/3Metaphorical Origin
The phrase has a historical link to drinking from cups; it's metaphorical for being drunk. 
After several toasts, Sir Walter was decidedly in his cups.
Pro Tip 2/3Old-fashioned Usage
It's an older phrase, so it can lend a vintage or formal tone to the speech. 
At the family reunion, Uncle George was a bit in his cups.
Pro Tip 3/3Caution in Usage
While not offensive, use carefully as it refers indirectly to someone's drinking. 
You might want to avoid discussing him being in his cups at the meeting.