(US, predicative, slang, vulgar) Very good; awesome; amazing.
Ah, man, I dunno what you're talking about, to me, beef broccoli pizza is tits!
2000, "The Tooth Fairy's Tats 2000" (season 4, episode 1), South Park
Eric Cartman: Yeah! This is so tits!
Ms. Cartman: Don't say "tits", Eric. Cartman: Oh, I mean this is so cool!
2003, The Venture Bros., Dean Venture,
"This place is tits!"