Vorführeffekt·When you want to show somebody something you can do but it goes wrong because they're watching you.
Grobmotoriker·Somebody, who is really bad at doing stuff, that requires patience and concentration or sb. who does things very quickly and thus doing many errors and mistakes.
Bettenburg·Literally bed fortress/castle, a derogatory term for a big hotel designed for mass tourism.
Mahlzeit!·A greeting or farewell from or adressed to a person heading off to lunch, or in the process of eating lunch.
Klickstrecke·Roughly, click trail. Those click-through galleries that e.g. news websites do to annoy people, increase page impressions and thus ad revenue.
Nestbeschmutzer·Nest soiler - Someone whose actions result in their own group/institution looking bad / incurring a disadvantage.
Qualzucht·Lit. agony breeding. The practice of breeding animals in a way that fosters or tolerates characteristics that cause the animals pain, agony, behavioural disorders etc.
Ewiggestriger·Someone who is forever stuck in yesterday and desperately clings to an outdated world view.
Sturmfrei·When all the people you live with are gone for a while and you have the whole place to yourself.
Übersichtlich·Describes something that presents information in an easily understandable and comprehensive way.
Scheissfreundlich·When someone is very friendly towards you and you think they're being friendly to butter you up they're being scheissfreundlich.