kemosabe
An appellation given to a wise, trustworthy friend.
Wanna get a beer? / Nah. / Come on. Let's get a beer. / Okay, leave me alone, leave me alone. / Don't stay up too late, kemosabe.
Where it comes from
Coined for the 1938 Lone Ranger television serial. Further etymology uncertain: *Some trace the word through the Kee-Mo Sah-Bee summer camp in Michigan to Ojibwe giimoozaabi (“he spies”). See more at Wikipedia. *Alternatively, from a corruption of Spanish quien lo sabe "(he) who knows".
Adapted from the Wiktionary entry kemosabe (CC BY-SA 4.0).