Synonyms of well up on in English:

well up on


See definition of be (well) up on (or in)

phrase

1‘I thought I was pretty well up on my internet jargon but I'm stumped on that one’

SYNONYMS
well versed in, well informed about, conversant with, knowledgeable about, informed about, abreast of, apprised of, up to date on, au courant with
familiar with, acquainted with, au fait with, at home with, no stranger to
experienced in, proficient in, practised in, skilled in
informal up to speed on, clued up on, genned up on, plugged into
formal cognizant of
dated perfect in
ANTONYMS

ignorant of, unfamiliar with