The saying "waddup tho" originated from San Jose, Ca or ESSJ. It's a way to greet your friends. It's like saying, Hi, how you been? I haven't seen you in a long time. What have you been up to? All in one word or two word depending on how you spell it. So next time you see your friend, say "Waddup tho!"
by Komik April 7, 2010