'Grugru worm' definitions:
Definition of 'Grugru worm'
From: GCIDE
- Grugru worm \Gru"gru worm"\ (Zool.) The larva or grub of a large South American beetle ({Calandra palmarum}), which lives in the pith of palm trees and sugar cane. It is eaten by the natives, and esteemed a delicacy. [1913 Webster]