łatwizna, łatwy jak bułka z masłem	as easy as pie;This game is as easy as pie.
sceptycznie, z przynrużeniem oka	with a grain of salt; Take everything what she's said with a grain of salt.
maczać we wszystkim palce	to have a finger in every pie; He is so busy, because he has a finger in every pie.
tryskający energią	full of beans;She was full of beans last evening.
jak dwie krople wody	like two peas in a pod;They are so similar. They are like two peas in a pod. 
czyjeś oczko w głowie	the apple of someone's eye;Her dog is the apple of her eye. 
gruba ryba, szycha	a big cheese; He's a big cheese in our company.
opanowany, spokojny	as cool as a cucumber;She was as cool as a cucumber in that horrible situation. 
tanie jak barszcz	as cheap as chips;These trousers were as cheap as chips. I didn't pay much for them. 
trudny orzech do zgryzienia	a hard nut to crack; Last algebra problem was a hard nut to crack.
rusz głową	useyour noodle;You can solve this problem! Just use your noodle.
kłopotliwa sprawa, problem	a hot potato; That case was a hot potato for the police.
to nie w moim stylu, nie moja bajka	it's not my cup of tea;Rap music is not my cup of tea. I prefer rock. 
małe piwo, bułka z masłem	a piece of cake; This task is a piece of cake.