This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Not humorous.

adj. lacking humor

"Unlike me, who is often unintentionally unhumorous."

sobersided    unfunny    po-faced   

humorous   

self-formed    hellenised    aspect    ear-to-ear    mazzinian    henpecked    pie-eyed    self-convicted    winkelried    insuppressible