This is the 6891st most frequent Japanese word.
ペコ
"ペコ" (peko) is an onomatopoeic expression indicating the act of bowing or hunger in a slang context.
ぺこぺこ refers to repetitive sound or action.
古いラジオはぺこぺこ音を立てています。
The old radio makes creaking sounds.
ペコペコ is an onomatopoeia describing extreme hunger.
彼はお腹がペコペコだと言いました。
He said his stomach is very hungry.
ペコリ is an expression indicating a slight bow for politeness.