Southwest Airlines equivalent of SSSS (see previously accepted definition highlighted) . Upon receiving the checkerboard you have to go through extensive secondary security screening because of pre-selected criteria.
Due to me flying one-way, I was given the checkerboard treatment by Southwest. Now I have to go through extensive security before the flight.
A person that is usually an entity of Sexually Transmitted Diseases, or is stupid enough to put green checkerboards on a roof of a germen car. Twisted logic like this produces a bigger ego than the sun.
"Damn I thought that checkerboard queer was never going to leave me alone, luckily she got in her gti and drove away, if she had stood here any longer I might of caught an STD