What Is This Hobby?

I frequently see in this forum references to "this hobby" and I'm always a little confused by the phrase. What exactly is this hobby?

onhwy6107-23-2010 7:03pm

macdadtexas Details Discussions Posts This discussion Message User 1,794 posts 07-23-2010 at 10:19pm Copy Comment URL Report Comment Edit Delete BWP, excellent Hemingway-esque explanation!!
macdadtexas Details Discussions Posts This discussion Message User 1,794 posts 07-24-2010 at 12:41am Copy Comment URL Report Comment Edit Delete I'm still with BWP.