Source : Webster's Revised Unabridged Dictionary (1913)

Hobson's choice \Hob"son's choice"\
   A choice without an alternative; the thing offered or
   nothing.

   Note: It is said to have had its origin in the name of one
         Hobson, at Cambridge, England, who let horses, and
         required every customer to take in his turn the horse
         which stood next the stable door.

Source : WordNet®

Hobson's choice
     n : the choice of taking what is offered or nothing at all