Simple past tense and past participle of grandstand.(verb)
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Use "grandstanded" in a sentence
"It would appear that Ritchie ran (some of) her proposals initially past the Executive and got nowhere; she then 'grandstanded' in public; she was supposed to return to the Executive (according to Poots) but announced her decision to the Assembly instead."
"Those numbers of course didn’t get much airtime as super committee lawmakers grandstanded by slinging around proposed cuts to social programs and tax breaks for the rich."
"He made the music swing in his distinctive way, but never grandstanded or pulled focus from the whole."