Simple past tense and past participle of peg.(verb)
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Use "pegged" in a sentence
"With my 40 yard pin pegged on his vitals, when I released that arrow, I was sure that bull was mine."
"I did not see the slobber that was coming out of his nose and mouth, I did not see the antlers on his head, all I saw was my 40 yard pin pegged on his vitals."
"I had the killer pegged from the very beginning, for no obvious reason other than she looked guilty."