An older woman who, refusing to recognize her aging body, continues to wear clothes more appropriate to a teenager, or at least to someone with a tight bod.
Often manifests in the form of a heavy-to-obese middle-aged woman sporting a bottle-blonde dye job, tight mini-skirt, tank top and big ear rings. The outfit reveals age spots, flab, cauliflower thighs, vericose veins and/or wrinkles, thus ruining the desired affect.
Gee, Trixie must be so-o-o-o embarassed! Her mom looks like a dead teenager in that leopard mini-skirt!