live dog is an underdog with (in their opinion) a pretty good shot of winning.
system plays are plays that fit a system like tampa 0-20 in home games. play this system all year and turn a profit.
in reality though, many times, system plays are fictitious made-up systems thrown out by players thinking they have unlocked the key to the golden goose. Trying to sound bravado and arrogant in that they have a reasoning for their play other than that they bet it. explaining a system that is often times fictitious is both fortuitous and unfruitful.
the beauty of a system is that you can make your own up. let's take the cubs today. cubs are undefeated when zambrano wears red socks. now you can post the cubs today and say you have a system assuming that zambrano is gonna wear red socks. in reality he probably won't. but then you can say your inside sources had bad info.
taking nothing away from the madjackers here that do post systems and reasoning. there are plenty of good ones with solid info. there's also plenty of bad ones posting "air"
gl