I think that's the champagne talking.
4 seconds sound clip from the Tommy Boy (1995) movie soundboard.
You can hear this line at 00:22:18 in the Blu-ray version of the movie.
Quote context
[...]
- And I am, kid. I am happy, Tommy boy.
- Chubby?
- I think that's the champagne talking.
- And so these vows are held sacred from now until eternity.
- You kiddin'? Go got 'em, Tom!
- By the powers vested in me by the State of Ohio, I now pronounce you man and wife.
[...]