This is one of my favorite drawings by David Shrigley. It can be found in a book I recently purchased, called Ants Have Sex in Your Beer. It is funny/very cruel. Also funny/very cruel are his two other books, Red Book, which I purchased recently as a gift for a friend, and Book of Shrigley, which I purchased as a gift for myself. David Shrigley lives in Glasgow, Scotland, and is apparently very tall (6'7"+).
Here is another one that I found on his website:
And one last one: