Lump-like.

(rare, transitive, intransitive) To make or become like lumps; make or become lumpy

(Marxism) The lowest stratum of the proletariat, whose mental and physical health, mores and morale have deteriorated, through exploitation by the bourgeoisie, to a degree where they cannot build class consciousness and hence cannot be mobilized for the revolution.

plural of lumper

(surgery) The surgical removal of a tumour or cyst from a breast.

plural of lumpectomy

In a lumpen manner.

plural of lumpenproletariat

lumpen beliefs or behaviour

plural of Lumper