yuo is teh suck Share definition Flag Lame, over-used 1337 for 'You suck'. Used when someone's attempts to be inpressive fail miserably. If you had to look this up then YUO is teh suck. yuo is teh suck by Gumba Gumba February 25, 2004 0 0 Get merch Get the yuo is teh suck mug. Buy Now — $32.95 See more merch