Starting today October 31 through November 4, Atlantans are invited to tweet their best McRib-tickling jokes, puns and one-liners @McDonaldsATL on Twitter – to enter, simply tweet a joke @McDonaldsATL using the hashtag #McRibticklers. Participants will receive a voucher for a free McRib sandwich redeemable in the Greater Atlanta area while supplies last. Limit one voucher per person. For additional information, please visit https://Twitter.com/McDonaldsATL.