Such behaviour is most unbecoming to a lovely gentleman.
7 seconds sound clip from the The Aristocats (1970) movie soundboard.
You can hear this line at 00:09:59 in the Blu-ray version of the movie.
Quote context
[...]
- Marie, darling, Marie, you must stop that. This, this is really not ladylike.
- Such behaviour is most unbecoming to a lovely gentleman.
- Ladies do not start fights, but they can finish them.
- We were just practising biting and clawing.
[...]