Severe, unsentimental, dry, so much so as to be maybe even a little bit funny.

严肃，不带感情色彩，晦涩难懂,如此这般以至于又多了一份滑稽有趣。

耶鲁公开课 - 现代诗歌课程节选

Or even just funny things, like if somebody put like "Hammertime" on a stop sign.

或者，有趣的是，好像有人把“哈姆时间”（美国真人秀）画在停车标志牌上。

街头艺术 - SpeakingMax英语口语达人