Scrambled serendipity

In yesterday's post "The hermit, the magician, the owl, and Hieronymus Bosch," I revisited an old 2019 post in which a book titled Serendipities manifested "a strange sort of anti-serendipity": The book caught my eye because the cover art was a painting I had recently posted about, but it turned out to be a version of the painting that lacked the key feature I had been interested in.

Today, a motorcyclist wearing this T-shirt was right ahead of me on the road for several minutes. (This is not my photo. I found it online.)

At first it looks as if it says SERENDIPITY, but the P and the R have been swapped, and the second E has been modified to the visually similar F. Below this SEPFNDIRITY is "DODF", which is harder to decrypt. My best guess is that it is a modification of "POOF" -- a sound effect associated with things appearing or disappearing as if by magic, which is somewhat related to the concept of serendipity.