here's what I found on the net...not quite the way I remember it...

With a dirty Mack and an evil grin
He walks the streets of old Wiggin
The police would like a word with him
He is the Phantom Flasher

Chorus
Is he here? Don't know.
Could he be? Probably.
think I see him standing next to you.
He is the phantom flasher
With a hey down down, with a hoe down down
Hey down, hoe down, has he got em down? (all)
He is the phantom flasher.

One day he flashed the widow Brown
She went and bought a wedding gown.
Now she chases him all through the town
He is the phantom flasher

Chorus

One day he flashed me in the park
With my spray can I made my mark.
Now he floresces in the dark.
He is the phantom flasher

Chorus