bad manners
nounUK /ˌbæd ˈmænəz/
US /ˌbæd ˈmænərz/
Bad manners means not being polite to other people.
It is bad manners to talk with your mouth full.
RELATED WORDS
OTHER MEANINGS
2. Not following the usual polite rules when eating.
Chewing loudly at the table is bad manners.
3. Being rude in a public place.
Shouting in the library shows bad manners.
4. Not saying please or thank you.
Grabbing the toy without asking is bad manners.