Definition of grig in English:

grig

Pronunciation /ɡriɡ/ /ɡrɪɡ/

noun

dialect
  • 1A small eel.

  • 2A grasshopper or cricket.

    ‘Humped-winged grigs are found in coniferous forests; C. strepitans also occurs in high altitude sagebrush.’
    • ‘You can listen to songs of grigs and find out more about them at the Web site above.’

Phrases

    as merry as a grig
    dialect
    • Full of fun; very lively.

      ‘Everyone said Annabelle had been merry as a grig before the man she loved married elsewhere.’
      • ‘I think it was a cricket, but when I heard it, I was merry as a grig!’
      • ‘They were more than fairly high, merry as grigs, and prepared to go on all night.’

Origin

Middle English (in the sense ‘dwarf’): of unknown origin.