A dime a dozen

A dime a dozen: regular, comum, sem valor

“Rude people in New York City are a dime a dozen. Everywhere you go, there are rude people!”

“English teachers in Korea are a dime a dozen. There are so many English speakers here!”  (www.idiomeanings.com)

TUNE

tune out = parar de prestar atenção em alguma coisa

tune up = regular, ajustar o motor de um carro / afinar (um instrumento musical)

tune in = sintonizar (radio, TV)

tuned in = diz-se de quem está consciente, atualizado