a predatory, usually 30 something female, born to breed and desperate for a(nother) child; an estrogenic timebomb.
don't go there man, she's got that air of desperation about her - a right womberang in waiting.
An ex girlfriend with a habbit of hanging around. You keep chucking her but she keeps coming back! Pronounced womb-errang
You dump your missus, but she keeps coming back for bonus sex - womberang