- Dangerously or extremely fast: he drove at breakneck speedMore example sentences
extremely fast, high-speed, lightning, whirlwind, rapid, speedy; dangerously fast, reckless, dangerous, excessive, precipitate, headlongventre à terre• informal hell for leather, at a lick, like the wind, like a bat out of hell, like a bomb, like greased lightning
- Breathlessly we run faster and faster at a breakneck speed to a destination we neither know nor can ever reach.
- It's both breakneck fast and much funnier than you would think.
- The players had been aware that this could pose the biggest test to the top-of-the-table status and came out of the blocks at breakneck speed.