In contrast to the plague of “LOL”,
not to mention OMG, an economical expression such as
“I’m like, hello?”
is brilliant. Our elders (or let’s face it, some of us) would have to fall back on a ponderous formulation like
“I must confess I found myself at a loss to respond to the sheer fatuousness of my companion’s comment, and could only register a mock expression of disdain”.
Cf. this cartoon found on the splendid https://twitter.com/PhilosophyMttrs: