jarred up Share definition Flag To get drunk. To partake in drinking many "jars". Jars is a British colloquialism for a pint of beer or cider. Did you see Leonard staggering around the pub last night? He was well jarred up! jarred up by David Geetmuckle January 2, 2009 0 0 Get merch Get the jarred up mug. Buy Now — $32.95 See more merch