-you push multiple keys at once
-you mis-spell at least twice in a sentence
-you make typos because you think you know where the keys are
or the most obvious sign:
you're on webcam with half a bottle of Smirnoff visible on screen
Dan was surprised to learn that, while he was out drinking late the previous night, he had purchased several shares of DNKN and SBUX during an apparent drunkvesting spree.