advanced

straight-face test: Idiom Meaning and Origin

store away: Idiom Meaning and Origin

stop dead: Idiom Meaning and Origin

stick out: Idiom Meaning and Origin

sticking point: Idiom Meaning and Origin

sticker shock: Idiom Meaning and Origin

stick a fork in something: Idiom Meaning and Origin

step forward: Idiom Meaning and Origin

stem the tide: Idiom Meaning and Origin

steely-spined: Idiom Meaning and Origin

stay tuned: Idiom Meaning and Origin

stand the test of time: Idiom Meaning and Origin