What is the crippled of little boy in a Christmas story by Charles dickens?

You're likely thinking of Tiny Tim, the crippled boy in A Christmas Carol by Charles Dickens.

Tiny Tim is the son of Bob Cratchit, a poor clerk who works for Ebenezer Scrooge. He is a kind and gentle child despite his physical disability. His famous line, "God bless us, every one!" is a symbol of hope and goodwill.