Heißhunger·A sudden appetite for something specific, often something sweet (literally means hot hunger). Source
Strohwitwer·Literally straw widow. Noun: A husband who's home alone while his wife is out of town. Source
Mahnmal·A specialised form of memorial, which would be Denkmal. mahnen means to remind, caution, urge, Mal is the -ial part. Hence why Holocaust memorial is a very, very fuzzy translation. Source
Kuckuckskind·(noun) Literally cuckoo's child: A child who is not raised by their biological father, but is raised by another man who (wrongly) assumes he is the biological father. Source
Kopfkino·Lit. 'mind-cinema'. The unvoluntary thoughts of usually bad, disgusting or scary things or situation caused by hearing them mentioned or talked about. Source
Bespaßen·To render fun or entertainment onto someone, to make sure someone has fun or is entertained. Negative connotation, the word implies the activity is a chore and the person doing the 'bespaßen' isn't having fun themselves. Source