Idioms are expressions. They are wonderful! Vamos conhecer more:
Not my cup of tea = something I don’t like.
E.g.: I don’t like funk music. It’s not my cup of tea.
Built on sand = not stable; algo que provavelmente will end soon.
E.g.: Uma relationship sem love is built on sand.
Put something to bed = stop talking sobre something or stop doing something.
E.g.: I don’t want to talk about it. Vamos put this assunto to bed.
Wanna know more? Access the original https://idioms.thefreedictionary.com/not+cup+of+tea, https://idioms.thefreedictionary.com/put+(something)+to+bed, https://idioms.thefreedictionary.com/be+built+on+sand to expand your culture.