1. to hit or attack someone from their blind side where they cannot see
Usage: sports
2. to surprise someone with something unexpected, especially something unpleasant

Examples

• The linebacker blindsides the quarterback during the play.
• The news of the company layoffs blindsides the employees.
• She blindsides her opponent with a sudden move to the left.
• The unexpected question blindsides him during the interview.
• The defensive player blindsides the runner from behind.
• The announcement blindsides investors and causes stock prices to drop.