
Hit/knock somebody for six
Emotional Weight
The phrase often implies deep emotional impact and should be used with sensitivity.
When she lost her job, it knocked her for six.
Personal Upset
Use this expression to describe personal turmoil, not minor inconveniences or good surprises.
The divorce proceedings really hit him for six.
Strong Reactions
Best used for events that cause a significant reaction that someone struggles to recover from quickly.
Her betrayal hit her best friend for six.