have a heart of stone - mieć serce z kamienia
If you can watch that sad movie without crying, you truly have a heart of stone.
wet blanket - sztywniak, malkontent
Stop being a wet blanket and just enjoy the concert with us!
green with envy- zielony z zazdrości
She was green with envy when she saw her friend's new car.
keep up appearances - zachowywać pozory
They were having financial problems, but they tried to keep up appearances by hosting big parties.
blow one's own horn - chwalić się
I don't mean to blow my own horn, but my idea saved the whole project.
be an awkward customer - mieć trudny charakter, być ciężkim w obyciu
Be careful with him, he can be an awkward customer if things don't go his way.
down-to-earth - twardo stąpający po ziemi
His down-to-earth attitude makes him a great leader.
couch potato - kanapowiec, leniuch
Stop being a couch potato — go for a walk!
cold fish - chłodny emocjonalnie
Linda is a real cold fish—she never shows any emotions, even when something exciting happens.
born leader - urodzony przywódca
As a born leader, he inspires people without even realizing it.