A small stick.
By extension of this, someone who is
bone-thin, usually unattractively so, whether they are naturally that thin or not.
Usually accompanied by chicken legs and a lack of booty in both sexes, a lack of muscle tone in males, and a lack of breasts and hips and curves in females.
Also see
Twiggy, legendary 1960s supermodel who idealized this androgynous, starving
waif look.
"I'm not a twig and I refuse to be."
-Kate
WinsletThis little twig is my
granddaughter? Aren't you feeding her?! She looks like a
swizzle stick!