German Konglish! Er....Kongman! Gerlean?

Yesterday I saw a student's mom wearing a t-shirt that almost killed me.  It was in German....kind of.  It had received the same Roman-letters-look-cool-so-we-don't-care-what-it-says treatment as English often gets on Korean t-shirts; accordingly, it made my day.  Possibly it also made my life.

I didn't catch one of the words, but I whipped out my notepad and wrote down the rest of it before I forgot it.  It said:

DIE KUNDE

IST ETNE

______ DES TEUFELS

which translates to:

THE CUSTOMER

IS DUKC

______ OF THE DEVIL

(The German word for "duck," Ente, was misspelled.)

Y'all.  IS THAT NOT AMAZING?  I'm so disappointed I couldn't see that one word; I really want to know what was of the devil!  Was it the duck-customer?  Or was it something else entirely?  The world may never know!