Contraction of the words lame and famous. Sometimes spelled "lameous." Not to be confused with lameass.
Used to describe so-called celebrities who are famous for no good reason, especially an internet celebrity or Myspace member who thinks he/she is hot shit because he/she has 50,000 profile views and 10,000 friends. Can also apply to Paris Hilton and her ilk.
The word acoustic being pronounced by a complete and total idiot who thinks he's coming off sounding like a French Rico Suave or something by the accident of not knowing how to really pronounce it. And you don't want to correct the guy because you hope he will be out there pronouncing it that way for the rest of his life. True story!
"Mark just said the word Lacoustic about 500 times in a row while talking about his brother's guitar!"