Dave Grohl Refuses to Talk Taylor Swift Diss, But Face Says It All

Play video content TMZ.com Dave Grohl won't say anything to expand or walk back his damning implication that Taylor Swift does not actually perform live at her shows ... but his eyes say it all. We got the Foo Fighters front man Thursday in Los Angeles and our photog asked him about his recent jab at Taylor. While Dave remains mum on the subject, opening his mouth only to finish his cigarette, his facial…