An expensive little novelty for electric guitarists. I made a note to self to investigate this strange word after hearing an REM song (E-Bow the Letter)... but then a day or so later I found out that a mate of mine had just bought one, so I had a go of it. It creates a strange sort of backwards underwater guitar sound. Have you heard Jimi's backwards solo in 'Castles Made of Sand'? That's what ebow sounds like, but that's not an ebow.