This entry is difficult since comments from LEO members [*] indicate that both of the words in the original LEO pair -- uncouth and flapsig -- are undergoing shifts in meaning that have not yet been reflected in the monolingual dictionaries [all dictionary entries are below].
The English word uncouth may be migrating toward the extreme end of its meaning spectrum, while the German flapsig seems to be moving toward describing remarks rather than behavior. Some bilingual dictionaries, however, do include entries that reflect the dual nature of flapsig and offer pairs such as flapsig-flippant [Bemerkungen] and flapsig-cheeky or flapsig-loutish [Benehmen]
To get things started, two suggestions:
[remarks] - flapsig
2. uncouth ill-mannered, uncultured
- flapsig flegelhaft
Some may object to uncouth, which historically covered a broad spectrum of unmannerly behaviors, but seems for some to have migrated exclusively toward extreme behavioral offenses -- i.e. those that are crude, boorish, uncivilized. Please suggest something more fitting! Impertinent was suggested in the thread linked below.
I hope there will be some lively discussion and we can agree on how to modify the current LEO entry.
* related discussion: flapsig - is it more than uncouth
: (Adjektiv; umgangssprachlich) schlechte, ungeschliffene Manieren zeigend; Beispiel: eine flapsige
: (Adjektiv; salopp, abwertend) flegelhaft; Beispiel: sich flapsig
benehmenEnglish Dictionaries:uncouthOED 2nd Edition
: uncouth adj.
6. Of an unfamiliar or strange appearance or form; spec., having an odd, uncomely, awkward, or clumsy shape or bearing
b. Of persons: Awkward and uncultured in appearance or manners. Also transferred senses; Of language, style, etc.; Of manners, actions, etc. American Heritage Dictionary
1. Crude; unrefined.
2. Awkward or clumsy; ungraceful.Oxford/Lexico
(adjective) Lacking good manners, refinement, or grace.
‘Max is unsophisticated, uncouth, rough and tough - but his heart is in the right place.’
‘There is a lot of snobbery - it's looked upon as a bit uncouth.’
‘My mum said it would be really uncouth of me to talk about money’
‘Shouting matches in the street are so uncouth, but sometimes you've just gotta.’ MacMillan Dictionary
(adjective) behaving in a way that polite people consider rude or offensiveflippantOED 2nd Edition
: flippant adj.
4. Displaying unbecoming levity in the consideration of serious subjects or in behaviour to persons entitled to respect. American Heritage Dictionary
adj. Marked by disrespectful levity or casualness; apologized for his flippant
(adjective) Not showing a serious or respectful attitude.
‘Though it may seem flippant
to say so, she's certainly damaged enough to be a star.’
‘For a minute, I saw a smirk rise to his lips, and I thought he'd make some flippant
remark.’ MacMillan Dictionary
(adjective) treating a serious subject or situation in a way that is not serious, especially when this annoys other peopleGerman-English dictionaries:
: (adjective (informal))
[Benehmen] cheeky (Brit) // fresh (US)
- cheeky /Brit/
Bemerkung - an offhand [or a flippant
1. flapsig unernst flippant
// eine flapsige
Bemerkung // a flippant
2. flapsig flegelhaft loutish
EDIT: Changed my mind again -- loutish seems restricted to louts, who are typically male.