The sound/feel of vigorously scrubbing or rubbing something hard (onomatopoeic).
鍋をスポンジでゴシゴシ洗った。
I scrubbed the pot hard with a sponge.
床の汚れをゴシゴシこすって落とした。
I rubbed the stains on the floor vigorously and removed them.
彼は額の汗をタオルでゴシゴシ拭いた。
He wiped the sweat from his forehead vigorously with a towel.