Green’s Dictionary of Slang

1. a tourist [SE boing, the sound of elastic snapping back; the image is of the head twanging backwards and forwards as its owner gazes at the big city sights].

1983

R. Price Breaks 41: I was a real turkey and a boing-boing tourist around that stuff. [Ibid.] 295: A passing boing-boing with a camera around his neck.

2. an embarrassing person [their constant movement and lack of calm].

1983

R. Price Breaks 171: I had a hard time imagining myself letting go, putting on a rubber face in front of people and [...] bouncing around like a shameless boing-boing.