How did Ernesto "Che" Guevara get the Che part of his name?

Question: How did Ernesto "Che" Guevara get the Che part of his name!?

Ok I know Che isnt his real name, it's a nickname or whatever but how did he get it, and what does it mean!? Please tell sources!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Guevara also established contact with a group of Cuban exiles linked to Fidel Castro through the July 26, 1953 attack on the Moncada Barracks in Santiago de Cuba!.[20] During this period he acquired his famous nickname, due to his frequent use of the Argentine interjection "che", which is used in much the same way as "hey" or "pal"!.[21]Www@QuestionHome@Com

Che;Brian
The other answer got it also when some called him they yelled
Che GuevaraWww@QuestionHome@Com