look up any word, like the eiffel tower:
 
2.
A slang term for native americans
Yo, whaddup guidon?
by aubb April 16, 2009
 
1.
A flag/symbol used to represent a military unit such as a squad, platoon, or battalion.
LT COL: "Make sure the guidon is 3 steps in front of the company, beside the company commander."

Guidon Bearer: "HOOAH"
by CadetSFC December 23, 2011