Gammy

exp.

Heard in Waterford, Kilkenny, Mayo, Cork, Galway, Longford, Westmeath, Sligo and Limerick

Broken, awkward, clumsy, or entirely useless in function.

In use

Stay away from that gammy stool before it collapses under ye la!

Posh English

Keep your distance from that decrepit stool before it collapses beneath you!

Same phrase, other counties