What is the Taste of a Liar? (Jojo's Bizarre Adventure)

Here's a question - can you TASTE a liar? The anime Jojo's Bizarre Adventure sure seems to think you can. I've come across the Taste of a Liar meme a few times and started to wonder if it was really possible. Today Loyal Theorists, we are exploring the truth behind being able to tell a liar by taste. Let's go!