Literally 'sarcasm' in German.
May seem cool to use till the dimmer members of society ask you what you could possibly mean by it, and wouldn't you be better off using 'sarcasm' in any case.
Often used as part of the phrase 'Ironie und Sarkasmus', particularly when specifying languages on Facebook profiles. Literally the phrase means 'Irony and Sarcasm'.
Somebody McSomething speaks English, Welsh, Ironie und Sarkasmus. (on Facebook)