Mr Stink is a children's book written by David Walliams and illustrated by Quentin Blake, first published in the United Kingdom in 2009 by HarperCollins.

Chloe meets a smelly tramp known as Mr Stink, befriends him and hides him and his filthy dog Duchess in the garden shed.

When he is discovered, Caroline, who advocates clearing homeless people off the streets, falsely claims to have invited him to stay with the family.

The TV appearance leads to an audience with the Prime Minister, who makes Mr Stink an offer to which Chloe says, "[S]tick it up your fat bum!".

A list of notable formats is as follows: Mr Stink was Walliams' second children's book, after The Boy in the Dress, also illustrated by Quentin Blake.