Andy Ruiz says he's not bothered ONE BIT by Tyson Fury calling him a "fat guy" ... telling TMZ Sports the Gypsy King is just bashing him to stay relevant!!!
Remember ... Fury made fun of AJ to our camera guy out in NYC last month ... clowning him for getting "knocked out by a fat guy!!!"
But, The Destroyer is taking the high road after the body shaming ... 'cause he says he's actually a fan of Fury .