Is it pronounced "greasy dick"? If I ever come across that one, I'll let my wife try it. Then I'll show her the label.
Spaten Lager fan here, that's my usual.
According to The Dictionary of Name Pronunciation:
Griesedieck is pronounced
GREE-za-deck.
See the Wikipedia entry for company history, etc.
Myself, when I drink beer I prefer a very dark porter.