Play with fire

SEE vs. SEA: They are pronounced in the same way - /si:/, but they mean different things. "There are lots of things to SEE under the SEA." = Mnogo se toga može VIDETI ispod površine MORA.

she always butters me up

over the moon

it's early days

Ready to roll - ready to leave, ready to start doing something    

catch someone's eye

things are looking up

walk on eggshells

apple polisher, informal, North American