A person, typically past middle-age (though not necessarily so) who is somewhat odd.
What a cooky old bird.
by Reginald P. Peabody February 6, 2011
Get the cooky old bird mug.
When girls pretend to support rangers/Celtic on old firm day in hope of they boy the fancy will show them some sort of attention, usually noticeable by a Snapchat story saying fuck the pope or queen
She’s such an old firm bird
by Kryptt May 2, 2021
Get the Old Firm Bird mug.