Big Mac Challenge-The Answer

Well, I got no takers for the Big Mac Challenge. And I even bought a gift card to McDonald's for the winner! Remember the clues?

It's green, found on the front of houses, looks like a leaf, and you can't lick it?

My guess was ivy. As soon as I said it, Mac said "Yeah! Poison ivy!"

So Poison ivy is green looks like a leaf, and grows on the front of houses.
And just like Sid in Ice Age, you should not lick it!