When you're playing a war game, and you suddenly are hit, it is common to say "omgmissile". This became adapted just to be said in general online chat, and is often shortened to omgmsl, which is mistaken for omgmisled.
John: omgmissile, I wus hit!
Paul: omgmsl, UR such a 'tard..
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.