1. Noun

   hard lump under the skin (e.g. adipous tumor, lymph node tumor, etc.)

2. Adverb (fukushi), Adverb taking the 'to' particle, Suru verb

   grinding against; pressing or rubbing with turning movements (e.g. someone's shoulders with one's elbow)

   Onomatopoeic or mimetic word

3. rolling one's eyes; goggling one's eyes; googly eyes

4. rattling sound

Also written グリグリguriguri