Olde English is when thou typest like this, and speaketh like this, and refer to everyone as "thee" and "thou."
If thou art quite lucky, thou wilt not end up as a bloody mess on thy reed flooring by the hand of an Agente of the PPC. If thou art unlucky, ye olde Agente shalt pointe out to thee that thy language is not based at all on Old English, but is in fact a corruption of Early Modern English, and might also mention that true Old English would be quite incomprehensible to a foole such as thee. Then thou shalt end up as a bloody mess on thy reed flooring.
Lay your gaze on Ye Eye of Argone for some particularlye gratuitouse examples of Olde English gone horriblye wronge.