Do the youth in your country use slangs? Have used slangs yourself?

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Slangs are words used in a manner that is understood mainly by sub population that use them-their meanings and interpretation does not apply in universal terms! In my country, the Youth are prone to using such words as "proggie" to mean programmes-you hear them say, "where is the proggie today guys?" meaning "where is the programme today friends?" If they want to praise their friends for some heroic deeds you hear them say-" that guy is War" Do you have slangs used by youth in your county? Do you have any slangs?