Simple past tense and past participle of yap.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "yapped" in a sentence
"He yapped from the bench, and later picked himself up off the ice after being face-planted into the glass."
"As the bank broke down and the light fell in upon them, they turned for a moment from their labors, and casting a foxy eye up at us, "yapped" sharply and bristled themselves."
"But ministers were discouraged from participating because they yapped so much the rehearsals took forever."