What is the meaning of Lumpy?

Full of lumps, not smooth, uneven.

Of a water surface: covered in many small waves as a result of wind; choppy.

nominative/vocative plural of lump (good-for-nothing)

nominative/accusative/vocative plural of lump (piece of clothing)

nominative/accusative/vocative plural of lump (thrift shop)

Source: wiktionary.org