Definition of lumbers:
(n) :
(Canada, US) Wood sawn into planks or otherwise prepared for sale or use, especially as a building material.
(v) :
(intransitive) To move clumsily and heavily; to move slowly.
(n) :
(figurative) Useless or cumbrous material.
(n) :
(baseball, slang) A baseball bat.
(n) :
(slang, vulgar) An erect penis.
(v) :
(transitive, with with) To load down with things, to fill, to encumber, to impose an unwanted burden on.