to only have eyes for sb	być w kogoś zapatrzonym jak w obrazek
to love sb to bits	kochać kogoś na zabój
the man/woman of one's dreams	mężczyzna/kobieta czyiś marzeń
to fall head over heels in love	zakochać się na amen
to get on like a house on fire	znać się jak łyse konie
to have a soft spot	mieć do kogoś słabość
to get up one's nose/wick/nervres	działać komuś na nerwy
to know what is what	to be an expert; wiedzieć co jest grany
to know one's stuff	to be an expert in one's field; znać się na rzeczy
the brains behind	the most intelligent person in a team; mózg całej operacji
a grey matter	intelligence, brains; szare komórki
to be nobody's fool	to be very clever; mieć łeb na karku
not to have a clue	to have no idea; nie mieć pojęcia
to have gift of the gab	to talk well and persuasively; mieć gadane
could talk the hind legs off a donkey	to be able to talk for hours; gadać i gadać, nie zamykać się
a know-all/ smart aleck	sb who shows off their cleverness in an irritating way; mądrala
to have nothing between the ears	to be extremely stupid; być głupszym niż ustawa przewiduje
to be slow on the uptake	understand things with delay or after explanations; mieć spóźniony zapłon
to pull wool over his eyes	to deceive sb; nabierać, okłamywać kogoś
to cannot make head or tail	to cannot make any sense; nie mam pojęcia (o co ci chodzi)
to be one sandwich short of a picnic	to be stupid; mieć pusto we łbie
to rave about	to be enthusiastic about
to be on top of the world/over the moon	to be extremely happy
to be down in the dumps	to be depressed
to look like the cat that got the cream	to look irritatingly pleased with yourself