The German word "lauter" can mean:
- louder (from laut = loud)*
- all kinds of
The word "Laster" can mean:
- truck/s
- vice/s
So, "lauter Laster" can mean:
- a loud truck
or
- all kinds of guilty pleasures
or
- all kinds of trucks
Enjoy our language!
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*(There is also "lauter" in the meaning of "pure, honest". But an "honest truck" would be a "lauterer Laster". Which would also be a louder truck... ah, forget about it.)