Adjective
self-serious (comparative more self-serious, superlative most self-serious)
Taking oneself too seriously, pretentiously and humorlessly convinced of one's own seriousness.
It’s hard to believe now, after the merry mayhem of its third and final season, but was once seen as the most crushingly self-serious show on TV. Source: Internet
You’ll likely assume things, perhaps about disaffected service and self-serious patrons, but then you’ll likely get the warmest staff welcome you’ve received in a Seattle bar recently—and from a bartender you’ve never met. Source: Internet