T̳͉̱ͯͩ͌͐ͮ͜ͅh̆͏̫̫̫̜̫a͇͕̮̘͉ͣͫ̑̀ͭtͩ̀ͪ̇̈ ͕̩͓̺͔ͤ͠w̼̘͒́̓͗o͏͕̱͉̠ủ̥̠̯̫͙͙͖ͧ̿l̮͓̣̣̥͂ͬ͟d̪̦̏ͩ̐͝ ̬̮̳̦̠ͫ̇͠b̴̄́e̮ͯ̇̂͂̚͠ ̱̬̄́̃̏͋̅z̷̰̞̙̼͓ͤ̏̐̈ȁ͍̫̽ͫ̌͐͌̆l̦͔̐̇ͧ̐̎͝ǧ̢̜̱ͯ͌ö̳̐ͤ͗̍̇ͅ

That would be zalgo: http://eeemo.net/