A storm in a teacup |
A thin excuse |
A vicious circle |
A weight was lifted off my mind |
A whipping-boy |
A white lie |
A wolf in sheep's clothing |
A word in season |
A/one's trump card |
A/somebody's weak point |
Act the fool/the giddy goat |
Act the hero |
Add insult to injury; rub salt into somebody's wounds |
After mature consideration |
Against all (the) odds |