Bubba Ho-Tep now available on DVD.
Can't say that there was any one particular line or scene that cracked me up, but about halfway through the movie I just started laughing uncontrollably.
The basic plot: Elvis Presley (played by Bruce Campbell) never really died. An impersonator took over his identity. Elvis finds himself in a Texas nursing home where he still suffers from a broken hip & a cancerous growth on his johnson. There, he teams up with a black man who claims to be JFK to fight a killer mummy in cowboy boots who is sucking the souls out of nursing home residents (through their butts).
Really, this is something you shouldn't miss,