A phrase that people outside of Boise
use to refer to Boise State's famous blue fieldturf.
People who live in Boise or people who claim to be BSU football "fans" that use the phrase are either A) not actual Bronco fans, or are B) bandwagon fans that jumped on after the Fiesta Bowl win (the 'A' type of fan also applies here).
"Can you believe that guy down at Buster's referred to Bronco Stadium as 'the smurf turf'? We kicked his ass out of the bar for that garbage."