When someone faking or putting up a front.
ni66a said he got it, he flaggin' dont believe him.
Whenever someone does not follow through with a plan.
Knox always be flaggin on poker nights and dinner plans!
1:Putting TV's in your car such that only the people in the car behind yours can see the TV
2:Showing Off in any manner
"Look at that mustang up there! dude is proto-flaggin."
"Look at that jit, he just proto-flaggin"