Bull, you certainly ought to know better.
4 seconds sound clip from the El Dorado (1966) movie soundboard.
You can hear this line at 01:25:28 in the Blu-ray version of the movie.
Quote context
[...]
- Well, that's the kid, the fella that was around with us all night.
- That's what I was asking Bull.
- Across the street at the stable. Saw somebody pointing a gun after us.
- He ought to know better than that.
- You want me to go after him?
- Bull, you certainly ought to know better.
- The first time in two months I've felt like doing nothing for you, now you don't want me to do it.
- Was there something wrong with that, or is it just my hangover?
- You made better sense when you was drinking.
- There must be some whisky around here some place.
[...]