Simple past tense and past participle of pong.(verb)
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Use "ponged" in a sentence
"Bullets pinged and ponged, embedding into the cement."
"It is possible that a healthcare bill could be "ping-ponged" to Obama's desk if the House would simply agree to pass the Senate version of the bill, but that's not likely to happen either."
"Even after voting “no” previously, he refuses to state whether he will vote no on the Senate version when it is ‘ping-ponged’ over to the House."