leetspeak
person a: ph34r my 1337 hax0rz ski11z person b: what?  here, person a appears to be of below average intellect, due to his/her liberal use of leetspeak
a form of writing whereby some letters in a word are replaced by a numerical likeness or other letters that create an identical or similar sound
"person a: ph34r my 1337 hax0rz ski11z person b: what?  here, person a appears to be of below average intellect, due to his/her liberal use of leetspeak" What is the definition of "leetspeak"?