zany
definition
funny in a bizarre or absurd way
example
The comedian's zany antics had the audience rolling in the aisles with laughter.
synonyms
quirkyeccentriccomedic
word origin — The word 'zany' originated in the late 16th century from the Italian 'zani', which referred to a comic servant or fool, deriving from 'Gianduja', a stock character in the Italian commedia dell'arte.