A grammatical combination derived by nuclear physics and a lot of marijuana that combines "tight" and "nitro". (as seen in the formula tight + nitro + pie + chronic = titro. Thus resulting in a radical godess-like compliment.
Dude, when you slayed Onyxia that was fucking titro!
Damn Stephanie you fuckin pimp slapped Nicky right in her emo ass face. That was titro!