A Scrabble champ is someone who is illiterate to the point it really is funny and un-shameful to poke fun at.
Khaled: Ha ha! Higz yu ar not gowing to teech me how tu speek inglish, I all reddy no how tu well enuff, tank yu
Higz: Khaled I see there is a shortage of ESL teachers in your region, or do you actually enjoy being illiterate? you seem to be quite the Scrabble champ, so I guess you are happy with things the way they are.