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1.
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.
by Piranha January 26, 2006
 
2.
Like a Pressed Ham. The bare buttocks is placed against a chain-link fence.
by Anonymous March 07, 2003