A Lapper

1. One who laps liquid, who takes liquid in with the tongue.
2. (in combination) Something (especially a race) that has a stated number of laps.
3. (sports) A competitor who is one lap behind another, in the same race, and hence physically in front.
4. One who wraps or folds.
5. A mechanism that overlaps material to make it thicker; a lapping cylinder or lapping machine.
6. (sailing) A headsail that overlaps the mast.