adverb, adverb taking the 'to' particle
Describes the sound or sensation of stepping into or sinking into something soft and wet, like mud or deep snow.
長靴で泥の中をズボズボ歩いた。
I walked through the mud with a squelching sound in my boots.
雪が深くて、足がズボズボ埋まった。
The snow was so deep that my feet sank in with a soft crunch.
adverb, adverb taking the 'to' particle
piercing through; plunging into
Describes the action of something sharp or pointed going into a soft substance repeatedly or deeply, often with a similar sound.
フォークをケーキにズボズボ刺した。
I plunged the fork into the cake repeatedly.