Source : Webster's Revised Unabridged Dictionary (1913)

Singsong \Sing"song`\, n.
   1. Bad singing or poetry.

   2. A drawling or monotonous tone, as of a badly executed
      song.

Singsong \Sing"song`\, a.
   Drawling; monotonous.

Singsong \Sing"song`\, v. i.
   To write poor poetry. [R.] --Tennyson.

Source : WordNet®

singsong
     adj : uttered in a monotonous cadence or rhythm as in chanting;
           "their chantlike intoned prayers"; "a singsong manner
           of speaking" [syn: {chantlike}, {intoned}]
     n 1: a regular and monotonous rising and falling intonation
     2: informal group singing of popular songs [syn: {singalong}]
     v 1: speak, chant, or declaim in a singsong
     2: move as if accompanied by a singsong; "The porters
        singsonged the travellers' luggage up the mountain"