| on the bubble equally likely to experience either of two results. The Cougars, who looked like they'd definitely be in the tournament a week ago, are suddenly a team on the bubble. Some states will vote for the Democrats, and some are likely to vote for the Republicans, but Arizona is on the bubble. Related vocabulary: live on the edge Etymology: based on the idea that something on the surface of a bubble is as likely to roll in one direction as in another |