An onomatopoeia for the sound or action of peeling or tearing off thin material (e.g., a sticker, plastic film, perforated paper); often used adverbially with 'to'.
シールをペリペリと剥がしたら、跡が残ってしまった。
I peeled off the sticker with a peel-peel sound, and it left a mark.
チケットをパンチで穴をあけて、ペリペリと切り離す。
They punched a hole in the ticket and tore it off along the perforation with a peripe-ri sound.
包装のフィルムをペリペリと剥がしてから食べ始める。
I peel off the package film with a peripe-ri and then start eating.