Master high-frequency phrases using the 80/20 principle for rapid Spanish fluency
Don't look a gift horse in the mouth
Bite off more than you can chew / Jack of all trades, master of none
Kill two birds with one stone
To cost an arm and a leg
To put your foot in it / To make a blunder
To pull someone's leg / To tease
To have one's head in the clouds / To be daydreaming
Not to sleep a wink
To be broke / To have no money
To call the shots / To be in charge