What is the EXRN token? I have some in my wallet, but I have no clue where it came from. Can anyone help me out? 
Lots of new ETH based coins throw out airdrops to random ETH addresses. It doesn't hurt to get a coin for doing absolutely nothing.
Most likely, the coin will never gain value -- but maybe it will, and you'll get money for nothing (maybe even chicks for free
)