H'lleh
When lazy teenagers pick up their phone and say "HELLO" but mess it up by dropping the E and adding an extra H at the end like they’re too dumb to speak properly.
"H'lleh?" (from a kid who just woke up and didn’t want to talk.)
"H'lleh?" (said by a kid who forgot how to say hello.)
"H'lleh?" (from a kid who thought it was a secret code.)