v.1. To drive a golf ball from the tee: The golfer teed off with a 300-yard drive.
2. To hit something or someone solidly with a sweeping blow or stroke: The batter teed off on the pitch and the ball flew over the outfield wall. The boxer was staggering, and his opponent teed off with a hard right-hand punch.
3. To start or begin something: They teed off the fundraising campaign with a dinner. We teed the evening off with cocktails at the hotel.
4. To start; begin: The conference will tee off Saturday morning.
5. Slang To make someone angry or disgusted: These phone solicitations really tee me off. The rude remarks teed off the speaker.
6. tee off on Slang To attack someone verbally: Critics teed off on the mayor for failing to balance the budget.