The term 'Useless Person' can be described by three crossword solutions: LEMON (5 letters), Fifthwheel (10 letters), and Neerdowell (10 letters). A LEMON is a slang term for a person or thing that is defective, unreliable, or unsatisfactory. A fifthwheel is someone who is not needed or wanted in a situation. A neerdowell is an old-fashioned term for a person who is lazy, shiftless, and of no use to society. All three terms describe someone who is considered to be useless.