1. [n]  a compact mass; "a ball of mud caught him on the shoulder"
2. [n]  a large piece of something without definite shape; "a hunk of bread"; "a lump of coal"
3. [n]  an awkward stupid person
4. [n]  abnormal protuberance or localized enlargement
5. [v]  group or chunk together in a certain order or place side by side
6. [v]  put together indiscriminately; "lump together all the applicants"

Lump
Lump

more details ...

1. \Lump\, n. [Cf. OD. lompe piece, mass. Cf. {Lunch}.]
   1. A small mass of matter of irregular shape; an irregular or
      shapeless mass; as, a lump of coal; a lump of iron ore. ``
      A lump of cheese.'' --Piers Plowman. `` This lump of
      clay.'' --Shak.
   2. A mass or aggregation of things.
   3. (Firearms) A projection beneath the breech end of a gun
      barrel.
   {In the lump},
   {In a lump}, the whole together; in gross.
            They may buy them in the lump.        --Addison.
   {Lump coal}, coal in large lumps; -- the largest size brought
      from the mine.
   {Lump sum}, a gross sum without a specification of items; as,
      to award a lump sum in satisfaction of all claims and
      damages.
   

2. \Lump\, v. i. [imp. & p. p. {Lumped}; p. pr. & vb. n.
   {Lumping}.]
   1. To throw into a mass; to unite in a body or sum without
      distinction of particulars.
            The expenses ought to be lumped together. --Ayliffe.
   2. To take in the gross; to speak of collectively.
            Not forgetting all others, . . . whom for brevity,
            but out of no resentment you, I lump all together.
                                                  --Sterne.
   3. To get along with as one can, although displeased; as, if
      he does n't like it, he can lump it. [Law]