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1.
To concur, or to come to a mutual agreement with a person in conversation. To accept. To roll with. A friendly greeting as well as goodbye.
(Guy 1&2)

Chemono can also be used in suggesting something to someone as a way to ask if they agree, or it can be a way of yielding to an idea contrary to your own.
(Guy 3&4)
Guy 1: Right or left?
Guy 2: Left.
Guy 1: Chemono.

Guy 3: Lets not go to the movies... Chemono?
Guy 4: Chemono. Lets go to the park instead.
by Keefer May 14, 2012