1) Heedless, thoughtless and lacking the ability to take others into consideration before acting.
2) Rude, boorish
3) Adjective describing the most common stereotypes
of the following types of people: celebrities
, loud people, attention whores
, road ragers
, party animals
, illegal immigrants
demanding rights, Bible beaters
/religious/anti-religious radicals, political radicals
, politically liberal
(Harley riders) and pretty much anyone who regularly does or says things which hurt or annoy others around them.