Boor
/bʊr/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
The term 'boor' has a negative tone and implies disrespect for others. 
Don't be such a boor; respect the speaker and listen.
Pro Tip 2/3Social Contexts
'Boor' is most commonly used to describe bad behavior in social settings. 
He became a boor during the dinner, loudly criticizing the host.
Pro Tip 3/3Cultural Perception
Perception of what's 'boorish' can vary between cultures; learn these nuances. 
In his culture, burping loudly is acceptable, but here he's seen as a boor.