grave (adjective) grave: serious; gloomy
Sinonime: blow a gasket, blow one's mind, blow one's stack, blow one's top, crack up, fly off the handle, freak out, go ape, go ballistic, go berserk, go crazy, go haywire, go nuts, go off the deep end, hit the ceiling, lose control of oneself, lose it, lose one's composure, lose one's mind, lose one's temper, wig out
Antonime: cheerful,
frivolous,
funny,
happy,
ridiculous,
silly