2 definitions by NeoShinobi

A common practice in prison to greet fresh meat with an unwanted and unnecessary hand job. Anal extrusions may also occur.
Paulie just got in the pen, time to give him the ole prison handshake, boys get the lube

Old man Sully is in the wrong part of town, he'd better get ready for a prison handshake

They've just started playing Its raining men, prison handshakes for all!!
by NeoShinobi September 27, 2009
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When an occasion is so popular/awesome that it gets crowded out with people so much that cars cannot drive down the road! Usually a sign of good times and banging music.

Festivals, Carnivals, & live gigs are usually them main culprits
'Goin up to carnival can you drop me off in Notting Hill bredrin?'
'Get the tube man, its gonna be a ROADBLOCK!'

'Dr. Dre doing a live free set in the ASDA carpark, get down there early, its gonna be a ROADBLOCK!'
by NeoShinobi April 4, 2010
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