“What are you gonna do, eat your way to college?” (from an old army recruiting commercial) said when someone’s being indecisive.
“I blame the parents”-source forgotten, but we say it facetiously when we’re lamenting something dumb one of our kids has done.
“Spoonbill” We went on a trip with relatives that included a visit to an animal park. One relative repeatedly said all she wanted out of the trip was to see a spoonbill (the bird). We now refer to the one thing someone really wants from something as their spoonbill. “What’s your spoonbill for Paris? My spoonbill’s the Luxembourg Gardens.”
“Bang cheese” My then two year old asked for “bang cheese”. Having no idea what that was I offered a number of cheeses, American, Swiss, cream cheese, string cheese, and so on, each of which was rejected. My increasingly frustrated kid finally demonstrated what he wanted by pantomiming holding a bottle and smacking it on the bottom. “Bang, bang, bang!” Ah, Parmesan cheese! 20-something years later we still call it bang cheese.