Straw is to be used as an adjective describing an event that was of superior quality. It can also be used to describe someone's skills at a sport and/or game. The origin of this a bit hazy, but it is believed that it originated when a group of young men were sitting at a restaurant and one man said it out of random. From then on, the word launched into lingo history.
"That was mad straw dude."
"I am so straw at this sport."