a distinctly Batangueno word from the Philippines; it means laughing so hard you just can't stop for at least a minute straight because it's just really really funny.
There are just some moments that are so beyond the usual LOLs, ROFLs and LMAOs, that you have to use the word 'utas'.
HAHAHAHAHAHA UTAS. Dude, stop it. You're killing me, man. Utas talaga! =))