No, Eddie Haskell does not say "Ce si le bon." That phrase is in French and doesn't match his character from the TV show "Leave It to Beaver."
You can say "bonjour, qu'est-ce que tu fais?" in French to mean "hello, what are you doing?"
"is this you" is translated "est-ce que c'est toi / est-ce toi" in French.
tout ce que je peux dire
You can say "Utilisez ce que vous avez" in French.
You can say "Ce n'est pas vrai" in French to mean "This is not true".
so, what do I say?
Ces't Ce Bon Vie
Ce n'est pas très bon.
it is no good = ce n'est pas bien (food) is no good = ce n'est pas bon
Ce n'est pas bon means 'this isn't good'.
c'est bon = that's good
'Enjoy your meal' is usually 'bon appétit' in French.
The cast of Ce bon docteur - 1909 includes: Mistinguett Albens Paul Landrin
what's good [for diner] tonight? is the translation of 'quoi de bon ce soir'.
The cast of Ce bon La Fontaine - 1918 includes: Georges Colin Mary Harald
You can say "bonjour, qu'est-ce que tu fais?" in French to mean "hello, what are you doing?"
"qu'est-ce que vous (faites) samedi" means "what are you (doing) on Saturday?" in French.