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Means "tranquil" or "calm". Also referring to a person of high intelligenc who is not to be messed with. Consiquences of insulting a person of this nature include but are not limited to: ass-whooping, name calling, severe stomping and embarrassment to yourself.
Guy: What's that guys name?

Guy 2: Tranquilino

Guy: Don't make eye contact...

Guy 2: Why?

Guy: Because you're an uneducated fuck! Thats why!!
by John Doesn't June 30, 2011