1 definition by Roman1077

Top Definition

An energy drink, mostly drunk by BMX ers in Farborough. Nornally gone on halves, two people buying a four pack paying half each, and a great drink to replace Red Bull

Guy1"Wanna go asda?"
Guy2"Yeah, wanna go halves on a four pack of Relentless?"

by Roman1077 December 13, 2007

Buy a Relentless mug!