Singular Pronounced puss-ess
A misspelling of pussies that was originally used by people in forums that can't spell good. The word is now used as a joke and as an insult at the same time resulting in much lulz.
Plural is Pussi. Pronounced Puss-eye
90% of people who talk trash on the internet are found to be pusses in real life.
The best of the best. Slang inspired by AMC's "Breaking Bad", in which the main characters Walt and Jesse make the most pure crystal meth around and due to the chemical formula of the substance, it is colored blue.
You gonna try out that new burger place in town? Their burgers are the blue stuff.