A: How’s your first day at the new company? B: The manager genned us up on the history and current status of the company in the morning and gave us a tour around the headquarters in the afternoon. Note: This idiom means “to inform or educate someone about something” or “to give someone the required information about something.” This informal usage is primarily heard in the U.K. “Gen” is a casual way to refer to “general information” and is also used as verb, meaning “to give information.” For example: So who’s going to give me the gen on （or “gen me up on”) what’s happened while I was away? | 