Stands for "harshing my mellow." Something to be used when you are annoyed, or your normally green aura has been turned red.
John: You need to be more responsible! What is wrong with you, don't you have any sense of trustworthiness?
Jeff: Chill out, man. You're HMM.
John: What? Filthy hippie!
Jeff: :P
When you are not sure if he lie or no
Boy:Gorge loves that guy
You:hMM
What do you think dummy? It's the noise people make when there thinking
1. What's your best knife
2. Hmmm
2. This one
*precedes to stab the first guy (or girl or other because I'm progressive)*
An acronym which stand for 'Human Male Milk', relating to sperm.
"Hey can I drink your HMM?"
"No, that's kinda gay"
The thing you say when you are thinking
Person 1: What kind of anime is the most autistic
Person 2: Hmm... all of them they’re faggy
What one says when the only appropriate response is almost nothing at all...
So what exactly are you going to say tomorrow? Hmm...