(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

A variety of potato, best known as the variety that failed in the Irish potato famine.

plural of Lumper

lumpen beliefs or behaviour

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