Weekend at Bernie's (1989)

Fun-loving salesmen Richard (Jonathan Silverman) and Larry (Andrew McCarthy) are invited by their boss, Bernie (Terry Kiser), to stay the weekend at his posh beach house. Little do they know that Bernie is the perpetrator of a fraud they've uncovered and is arranging to have them killed. When the plan backfires and Bernie is killed instead, the buddies decide not to let a little death spoil their vacation. They pretend Bernie is still alive, leading to hijinks and corpse desecration galore.