Assassin Teemo
One of the most fun things I've done in the field of nonmeta builds (its not that nonmeta, but still never done so I consider it to be)
the build:
with
or 
I just sit top lane all game, literally never stop split pushing. shroom the entire top half of the map, and if someone comes, either run if you cant handle them while they run over your shrooms, or just stealth and wait for them to walk by. once they do, auto dfg q auto and they die instantly. I have yet to do badly or even not win with this build/playstyle.
sorry I don't have a video, LoLReplay doesn't seem to like working on my computer no matter what I try :(
anyways, post your own nonmeta builds that you've had success with. I'd love to get other idea's on things to try. remember, this is builds, not roles (otherwise I woulda mentioned my
top)
also helps
Step 2: Find a bush that the enemy players seem to frequently pass through and drop a shroom in it.
Step 3: Sit on the shroom until you turn invisible with Teemo's passive.
Step 4: Wait until someone steps on the mushroom.
Step 5: Hit them with Deathfire, Q, BotrK - in that order.
Step 6: Laugh when they disappear.