n. 25B6; adjective
the mood is decidedly downbeat : PESSIMISTIC, gloomy, negative, defeatist, cynical, bleak, fatalistic, dark, black; despairing, despondent, depressed, dejected, demoralized, hopeless, melancholy, glum.
his downbeat joviality : RELAXED, easy-going, easy, casual, informal, nonchalant, insouciant; low-key, subtle, unostentatious, cool; informal laid-back.