big deal noun 2exclamation 1forms 1 noun2 •(informal) Something very important or difficult; a matter of great concern; a considerable feat or achievement.It's a big deal to him to get this promotion.It's no big deal if you don't finish it today. •(informal) Someone very important; a VIP.She's a big deal in music in Spain. exclamation1 •(informal) Indicates that something is not important or impressive; so what.He can run a mile in six minutes? Big deal! Some people can do it in four.So you beat the worst team in the league. Big deal, call the TV crews. formsbig deals
