| work the room | | | |
| work to rule | | | |
| work with one's hands | | | |
| work wonders | | | |
| world-beater | | | |
| world of difference | | | |
| world record | | | |
| worlds apart | | | |
| worlds away | | | |
| worm food | | | |
| worm's-eye view | | | |
| worm turns | | | |
| worse for liquor | | | |
| worse for wear | | | |
| worship the ground someone walks on | | | |
| worship the porcelain god | | | |
| worship the porcelain goddess | | | |
| worst comes to worst | | | |
| worst-kept secret | | | |
| worst of both worlds | | | |
| worth a Jew's eye | | | |
| worth every penny | | | |
| worth one's salt | | | |
| worth one's weight in gold | | | |
| worth one's while | | | |
| would | | | |
| woulda, coulda, shoulda | | | |
| would give a Jew's eye | | | |
| wouldn't be seen dead | | | |
| wouldn't shout if a shark bit him | | | |
| wouldn't you know | | | |
| wouldn't you say | | | |
| wrack and ruin | | | |
| wrap around one's little finger | | | |
| wrap in cotton wool | | | |
| wrap in the flag | | | |
| wrap up | | | |
| wrestle with a pig | | | |
| wrist-slap | | | |
| write checks one can't cash | | | |
| write for the drawer | | | |
| write oneself into a corner | | | |
| write one's own ticket | | | |
| writer's cramp | | | |
| write the book | | | |
| writing on the wall | | | |
| written all over someone's face | | | |
| written in the stars | | | |
| wrong crowd | | | |
| wrong number | | | |
| wrong side of the tracks | | | |
| W-shaped recession | | | |