Kurikuri is the Japanese onomatopaeia for a twisting sound. Kuri also means chestnut. I can't really remember Furikuri now, but I think it was a pun or something? Sorry, I don't have the series around to check.
EDIT: No, shit. It's guruguru that's twisting.

Kurikuri means 'big and round'. I think one character says it about another's breasts, and someone hears it not as 'big and round' but as 'like chestnuts'?