From Longman Dictionary of Contemporary Englishgengen1 /dʒen/ noun [uncountable] British English informalINFORMATION informationgen on She has all the gen on cheap flights.
Examples from the Corpus
gen• Anyway, that was all background gen.gengen2 verb (genned, genning) → gen up→ See Verb tableExamples from the Corpus
gen• Anyway, as everything's now finalised, I can gen you up properly.Gen.Gen. (also Gen British English)PMAthe written abbreviation of General Gen. Philippe Morillon 