More shots have been fired in Zach Bryan‘s breakup with Brianna Chickenfry — this time in the form of a diss track from Barstool Sports president David Portnoy and social media personality Josh Richards. Portnoy and Richards are Chickenfry’s co-hosts on the BFFS podcast, and the two men posted their anti-Bryan song on the podcast’s social media, along with an elaborate accompanying music video. Their song is called “Smallest Man,” an apparent reference to Taylor Swift‘s “The Smallest Man Who Ever Lived,” which is rumored to be about Swift’s short and ill-fated relationship with the 1975 frontm…