| Knuckle-headed gestures of affection? |
| Knuckleballer Yoshida, currently the only professional woman pitcher in the U.S. (for the Chico Outlaws) |
| Knucklehead |
| Knuckle-dragging sorts |
| Knuckleheads |
| Knuckle-headed delivery? |
| Biting fingernails and cracking knuckles |
| Biting fingernails or cracking knuckles |
| Knuckleheaded |
| Teasing knuckle rub |
| Knuckle dragger |
| Knuckle under |
| Hip or knuckle |
| Knuckle-head move? |
| Knuckles under |
| Cause of white knuckles |
| Knuckleball catcher |
| Knuckle-headed action? |
| Knuckleballer Phil |
| Word with back or knuckle |
| Get ___ on the knuckles |
| Lovable knucklehead |
| Ball dragger |
| Knuckleheaded blunder |
| Bare-knuckle, as politics |
| Knuckle-headed antic? |
| Knuckle sandwich |
| Knuckle sandwich ingredients? |
| Head knucklehead |
| Knuckle ball legend Wilhelm |