Definition of clumper:
(n) :
Something that forms clumps.
(n) :
A grass or other plant that tends to form clumps.
(n) :
One who generalizes or finds commonalities, as opposed to one who focuses on identifying differences
(n) :
One who clumps; one who walks with a clumping gait.
(v) :
To move heavily; to clomp or clump.
(v) :
To make a clumping noise.