cantankerous

@600 Kilo Bear: cute.

Alternatively, you could just learn German (e.g. via Rosetta stone) and modify it slightly:

(1) “a” becomes “o” or “u”

(2) “o” becomes “oy” or “ey”

(3) “ei” becomes “ai”

(4) “ch” is always guttural like khof or ches

(5) 5-15% of other words get replaced with Hebrew/Aramaic derivatives

and you have something that will pass for Yiddish.

Protip: learn Viennese or Franconian German and (1)-(4) are unnecessary.

(BTW I am being sarcastic, but only slightly)

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