ぼりぼりmunching, crunching, scratching (an itch)

頭(あたま)が痒(かゆ)いのでボリボリ掻(か)きました。

My head was itchy, so I scratched it vigorously. {munching, crunching, scratching (an itch)}

雨(あめ)をボリボリ噛(か)んだら舌(した)を切(き)ってしまった。

I ended up cutting my tongue when I was crunching on the rain. {munching, crunching, scratching (an itch)}

煎餅(せんべい)をボリボリ食(た)べたら辺(あた)りが散(ち)らかってしまった。

When I was munching on the rice cracker, it made a mess around me. {munching, crunching, scratching (an itch)}

ビスケットをボリボリ食(た)べながら映画(えいが)を見(み)るのが好(す)きです。

I like watching movies while munching on biscuits. {munching, crunching, scratching (an itch)}

妊娠(にんしん)中(ちゅう)、なぜか分(わ)からないが氷(こおり)をずっとボリボリ食(た)べていました。

During pregnancy, for some unknown reason, I was constantly munching on ice. {munching, crunching, scratching (an itch)}