I'm pretty new myself to TTCAL, but from what I surmise, a goat is an uber-annoying person who stirs up drama on the board by posting drive-by BFP's or any other sort of annoying post. They also seem to be known for the "Am I pregnant?" posts. From wherever the elusive goat resides permanently, make no mistake, they will rear their ugly faces on the TTCAL board from time to time. If you'd like to stamp out these posts, help yourself to a TTCAL Goat Wrangler badge: Giddyup!
Here's the link for the pic: (http://tinypic.com/r/2v2dzyc/5) - take out the ( )