Quote from Jill in Some Like It Hot Rod
Jill: No, guys, guys. You can't sing "Ba bum ba bum bum." It's "Pa rum pa pum pum." "Ba bum ba bum bum" just doesn't make any sense. Boy: What's the difference? Jill: Well, the difference is, if you sing "Ba bam ba bum bum" instead of "Pa rum pa pum pum," everybody'll think you're da da da da dumb.