Anything that's anything. Can be a substitute for any word.
Ennis joslin derived from a road sign that was driven past in Corpus Christi, TX, 1973 when a young lad named Jlaw said "I'm just joshin with you," to which another lad by the name of BRT immediately replied "I'm just ennis joslin' with you," with an emphasis on ennis joslin' like no other. From that moment forward the lads began to replace different words or phrases with "ennis joslin." An example of this would be "Ahh, I'm ennis joslin' all over myself right now." The lads later determined that ennis joslin could be used for any verb on planet earth, but later discovered that ennis joslin could be used for any word at all. So what could ennis joslin be classified as you ask? Is it a noun? A verb? An antecedent or a demonstrative pronoun? There's only one possible solution - It's an ennis joslin, which could be defined as the following: anything anybody wants it to be. It is the most scrumtralescently beautiful ennis joslin ever conceived by human beings.