Entry 3 senses · 2 variants Webster, 1913 Lumper /lŭm'-pẽr/ · Lump·er · IPA /ˈlʌmpɚ/ n. n. 01 n. The European eelpout; -- called also lumpen. 1. The European eelpout; -- called also lumpen.(Zool.) Also: lumpen 02 n. One who lumps. 1. One who lumps. 2. A laborer who is employed to load or unload vessels when in harbor.