Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
jŏcŭlor, āri [joculus], to jest, joke; only in part. pres.: incondita quaedam joculantes, Liv. 7, 10, 13.
Hence, adv.: jŏcŭlanter, jestingly, jokingly: compellare, Sid. Ep. 1, 2.