"You're s**t at dying"

"No One". Sandor "The Hound" Clegane mortally wounds the last of four members of the Brotherhood Without Banners who massacred the pilgrims he was staying with, and demands to know where their leader with the yellow cloak went. The wounded man manages a pained, "Fuck you!" Sandor tells him he surely think of better last words, and the poor guy manages to call him a certain word for female genitalia before Sandor finishes him off.

Example of:
Lame Last Words