Adverb
Verb (する)
Onomatopoeic
1. rumbling (of thunder, one's stomach, etc.); grumbling; growling; purring
ゴロゴロと、遠くで雷の音が鳴った。Thunder rumbled in the distance.
2. rolling (of something large and heavy); tumbling
ゴロゴロと転がりながらも、彼女は起きようともがく。While tumbling and rolling, she struggles to get up.
3. all over the place; everywhere; commonly; in great numbers
そして俺より強いのがゴロゴロいる。And there are tons of people stronger than me.
4. idly; lazily; slothfully
いつもなら、もう少し部屋でゴロゴロしてるのに。Usually, I would be lounging around in the room a bit longer.
5. (uncomfortable feeling of) having a foreign substance in one's eye, stomach, etc.
Noun
Children's language
Onomatopoeic
6. thunder