boronia, honey, I know! and I'm so sorry....think I was the first to post that I was the first newbie to this word. My bad - mea culpa mucho.

Well, I only remembered to ask two people - but both of them had heard of brinkmanship (without the additional "s"). One is Canuck-born and in his mid-forties, t'other is Canuck-naturalised (born in UK) and in her mid-seventies. FWIW.