Christa BakkerMustard after the meal (mosterd na de maaltijd): when something would have been good, but it's too little too late. Not in a food-related way, though.
Blowing from up high in the tower (hoog van de toren blazen): to talk big, be high and mighty
Throwing soot in the food (roet in het eten gooien) - Mess a good thing up.
It'll be a sausage to me (Het zal me worst wezen) - I don't care.
To carry water to the sea (Water naar zee dragen): Engage in a pointless activity.
Being gilded with something (verguld zijn met iets): being extremely pleased about something.
I've gardened into it! (Ik ben erin getuind) - I've fallen for it.