1. A word to exclaim an idea that is extremely hip.
2. A jam session usually with two or more ukulele's.
A-"Jam session tonight? XD"
British slang, akin to Tramp. Regg's live on the streets and have long greasy hair from either personal choice or no access to public or personal showers. Can often be found busking outside train stations or begging for free money in the street.
A - "oi mate can you lend us a quid maaate?"
B - "Keep away, filthy Regg"