I. gen 1 /dʒen/ BrE AmE noun [uncountable]
British English informal information
gen on
She has all the gen on cheap flights.
II. gen 2 BrE AmE verb ( past tense and past participle genned , present participle genning )
gen up phrasal verb British English informal
to learn a lot of information about something for a particular purpose
gen up on
Gen up on the company’s product before the interview.