From Merriam - Webster’s Word of the Day

The Word of the Day for Jan 31 is:
puckish \PUH-kish\ (adjective): impish, whimsical

Example sentence:
Bert delighted in teasing his colleagues, and fortunately they recognized his puckish behavior as good-natured and tolerated it cheerfully.

Did you know?
We know Puck as a mischievous sprite who changed shapes, caused milk to spoil, and frightened village maidens in Shakespeare’s A Midsummer Night’s Dream . The Bard drew on English folklore in casting his character, but the traditional Puck was more malicious than the Shakespearean imp; he was an evil spirit or demon. In medieval England, this nasty hobgoblin was known as the “puck,” “pucke,” or “pouke.” To the Irish, such a creature was the “pooka,” and to the Welsh, he was “pwcca.” But it was the Bard’s characterization that stuck, and by the time the adjective “puckish” started appearing regularly in English texts in the late 1800s the association was one of impishness, not evilness.