Brevitas is a rhetorical style defined in Rhetorica ad Herennium as "the expressing of an idea by the very minimum of essential words." "Shit happens" and "c'est la vie" are examples.
By implying more than is said, it is distinguished from tautology and understatement.
Brevitas is related to aphorism, parataxis, sprezzatura and elliptic linguistic style. It contrasts with periphrasis, aureation and pleonasm.
References
Brevitas Wikipedia(Text) CC BY-SA