A "loser" is someone like Rayhero. Don't be a loser nerd idiot like him.
Normal person: Hey! What do you think you're doing Loser?!
Nerd: Ah sorry, I learned it from Rayhero.
A feeling for when you feel sick, down, or sad. Used mainly when you can't describe or don't know the word to use to communicate the way you feel.
It can also be used to describe your current mindset.
Oh man, last night I drank too much and now I'm just all blehug.