The present participle of 'gally'; the action of scaring, frightening, or making noise to startle.
From 'gally' plus the present participle suffix '-ing'; maintaining the dialectal sense of alarming or disturbing something.
Gerunds like 'gallying' preserve the feeling of action happening right now—it's more dynamic than just saying 'scaring,' giving readers the sense of ongoing mischief or disturbance.
Complete word intelligence in one call. Free tier — 50 lookups/day.