When a person stays out doing sketchy things until the early hours of the morning. For example, 3 am would be 9 pm in jen hours. Almost like dog years, but in hours.
"Bro did you see jakes snapchat story at 4 am, he was hitting up every lit party on the block"
"Yeah dude! He wasnt even tired, he's been on jen hours lately"
"Yeah dude! He wasnt even tired, he's been on jen hours lately"
by Meltherealog June 20, 2017