n Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape.
n A swelling or nodule of tissue under the skin or in an internal part of the body.
n A group, set, or unit.
n A small, shaped mass of sugar, typically about a teaspoonful.
n A dull or lazy person.
n A fat person.
n (informal, as plural) A beating or verbal abuse.
n A projection beneath the breech end of a gun barrel.
n A kind of fish, the lumpsucker.
n (obsolete, slang) Food given to a tramp to be eaten on the road.
n (obsolete, slang) The workhouse.
v (transitive) To treat as a single unit; to group together in a casual or chaotic manner (as if forming an ill-defined lump of the items).
v (transitive) To bear (a heavy or awkward burden); to carry (something unwieldy) from one place to another.
v (transitive) To burden (someone) with an undesired task or responsibility.
v (transitive, slang) To hit or strike (a person).
v (intransitive) To form a lump or lumps.