Source : Webster's Revised Unabridged Dictionary (1913)

Lob \Lob\, v. t. [imp. & p. p. {Lobbed}; p. pr. & vb. n.
   {Lobbing}.]
   To let fall heavily or lazily.

         And their poor jades Lob down their heads. --Shak.

   {To lob a ball} (Lawn Tennis), to strike a ball so as to send
      it up into the air.

Source : WordNet®

lob
     v : propel in a high arc; "lob the tennis ball"
     [also: {lobbing}, {lobbed}]

lob
     n 1: an easy return of a tennis ball in a high arc
     2: the act of propelling something (as a ball or shell etc.) in
        a high arc
     [also: {lobbing}, {lobbed}]

lobbed
     See {lob}