A political Comment or commentary on Obama which can be either positive or negative, but generally from the perspective of Obama's political base of support or a generally pro-Obama point of view, offering a defense of Obama against some ridiculous charge or conspiracy theory offered by opponents. "Comma" indicating a pause or break from the momentary insanity.
Was that a "Terrorist fist JAB"!!!
No, that is called "dap" and it is a gesture done by athletes to indicate team spirit, congratulations, or as inspiration to perform well. (That is an Obama Comma)