co jednomu prospívá, jinému škodí

Some people love his music; others hate it. One man's meat is another man's poison. http://home.t-online.de/home/toni.goeller/idiom_wm/id443.htm

bez práce nejsou koláče

saying

At dinner that night we were discussing the whole affair and I said:" Oh well, you can't make an omelette without breaking some eggs," which led to the classic retort from Ed Prior, my engineer:" Yes, but you didn't have to break the whisk!" BNC

But before you can make an omelette you gotta break a few eggs, ain't that so? BNC

I think the old point is anyway you can't make an omelette without breaking eggs. BNC

z bláta do louže

He left one job because of the low pay , but in his new one he has to work with unpleasant people—out of the frying pan into the fire! (Longman)

paci  paci pacičky (dětská hra)

And when assembly lasts too long they start getting bored and roll on the floor or play Pat-a-cake.BNC

Play finger rhymes like Round and Round the Garden, Pat-a-cake, Row Your Boat, and This Little Piggy. BNC

She took a playful swipe at his face, but Harvey caught it on the flat of his hand, then she struck at him with the palm of the other hand and they did a pat-a-cake routine. BNC

1) /uncountable/ pepř

2) /countable/ paprika

rajské slasti, vzdušné zámky

At first his theories were dismissed as pie in the sky. Macmillan Dictionary

je to hračka

After climbing mountains in the Swiss Alps, going up English hills is a piece of cake. (Oxford Idioms)

podíl na zisku nebo výhodách

ohřívač talířů

The Eclipse is exceptionally easy to control, with mains electric ignition, a slow cooking facility, a plate warmer (in the grill area) and an oven timer which you can pre-set to switch the oven on and off at times convenient to you (perhaps while you're busy entertaining guests before the meal). BNC