v.1. To hurl or fling someone or something off with great force or speed: The horse threw the cowboy off. The running back threw off the tackle.
2. To remove some clothing hastily or carelessly: I entered my apartment and threw my coat off. We threw off our jackets in the hallway.
3. To cast something out; rid oneself of something: I threw off all the unpleasant memories of my childhood. We threw our grudges off in order to move on.
4. To give something off; emit something: The exhaust pipes threw off fumes. The chimney throws soot off.
5. To distract, divert, or mislead someone or something: The scent threw off the dogs. A wrong measurement threw her estimate off.
6. To do, finish, or accomplish something in a casual or offhand way; toss something off: I threw off a quick response to the letter I'd received.
7. To stop the operation, activity, or flow of something controlled by a flip switch: After the meeting, I told them to throw off the lights. You can throw the current off the back porch with this switch.