1. Bizarre Internet phenomenon of the man who can be seen in any photograph.

2. Public Relations stint gone wrong

3. The man who is always there and yet never there.
The second gunman on the grassy knoll is actually Wall Guy.
by yosarrian August 9, 2005
I Mitt Romney am the classic definition of a Wall Street guy.
Can you spare some change brother? I'm a bit light.
by Almond0 December 31, 2011