At one fell swoop
This means in a sudden move or all at once but started out with more sinister connotations.
The expression is often wrongly quoted as ‘one foul swoop’, or even ‘one fowl swoop’, but it doesn’t relate to chickens.
In Shakespeare’s Macbeth, Macduff on hearing of the death of his family says;
All my pretty ones?
Did you say [more…]