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
Usage: informal

1. the act of hitting or surprising someone unexpectedly
Usage: informal

Examples

• The linebacker was penalized for blindsiding the quarterback.
• The company’s sudden layoffs were blindsiding to the employees.
• She felt like her friend was blindsiding her with the bad news.
• The defensive end came around the corner, blindsiding the running back.
• His resignation was a complete blindsiding of the board members.
• The reporter’s tough questions were blindsiding the politician.
• The blindsiding tackle left the player shaken but uninjured.