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