Wow...there have been a lot...
Unfrozen Caveman Lawyer
Landshark
John Belushi as the Samuri
Ubetcha - "Cheeseburga! Cheeseburga! Cheeseburga!"
Mr. Robinson's Neighborhood
...but my favorite of all is probably...
Eddie Murphy in
James Brown's Celebrity Hot Tub Party
"I'm gonna git in da wata! DUN, DUN, DUN, DU-DUN Owwww!"