Cochise not tell em lyrics tell em whats up tell em its on

I think I can help you out!

The lyrics you're thinking of are likely from the song "Cochise" by Audioslave. Here's the relevant part:

"Cochise, not tell 'em, tell 'em what's up, tell 'em it's on"

The full lyrics are:

"Cochise, not tell 'em, tell 'em what's up, tell 'em it's on Cochise, not tell 'em, tell 'em what's up, tell 'em it's on"

The song "Cochise" is from Audioslave's self-titled debut album, released in 2002. The song features Chris Cornell's powerful vocals and Tom Morello's distinctive guitar work.