* Faire chou blanc = to obtain a nil result, to draw a blank

“chou blanc” might come from a twist of “coup blanc”
“coup” is pronounced “choup” in the Berry dialect

* Faire ses choux gras = to make profit of

* Aller planter ses choux = to retire to the countryside

* B?te comme chou = very stupd, silly

* Etre, finir dans les choux = to fail in an undertaking, a venture
to be up the spout

* Tonner sur les choux = to make more noise, fear than hurt

* Feuille de choux = little worth newspaper

* Bout de Chou = litttle child

* Mon chou, ma choute, mon petit chou, mon chouchou = darling, dear, honey,
my teacher’s pet as explained above by Seb’s bit old “chouette choute”