A specific version of Oh My Jonas. Related to one Jonas Brother, Kevin. Girl ranging from 12- 18 will generally use the term OMKJ or any other version of OMJ when talking about anything, even if its completely unrelated to the Jonas Brothers.
" Wow the concert last night was awesome"
"OMKJ Kevin is by far the hottest Jonas"
A version of OJD (obsessive Jonas Dissorder) But this one is specific to Kevin Jonas. Sufferers will only recognize it when someone else is suffering from serious OJD, ONJD, OJJD, or OJKD. People suffereing from serious OKJD will follow Kevin around, stalk his Facebook, Myspace or blogs, and pay serious prices for concert tickets, and supply to make homemade TShirts.
"OMJ I am soooo in love with Kevin Jonas... hes wonderfully perfect"
-"Wow you have SERIOUS OKJD"