The Caveman's Valentine (2001). Possibly also Resurrecting the Champ (2007). He plays a homeless man in both, but I'm not sure which is the one where he plays an alcoholic homeless man. In the Caveman's Valentine, I think he's just mentally ill (he has hallucinations) but it's been a long time since I've seen this movie, so I just can't remember. I read the synopsis for each movie in imdb (internet Movie DataBase) but neither one mentioned alcohol.
See the Related Links below for the imdb entries.
The Caveman's Valentine.
The movie is "No Good Deed."
jungle fever
Elijah Price
A Time To Kill
The Caveman's Valentine.
Samuel l Jackson
The movie is "No Good Deed."
will smiff
jungle fever
Elijah Price
A Time To Kill
Shaft
Shaft
Coach Carter
The Samaritan.
This was a line used by Samuel L. Jackson in the movie Pulp Fiction.