Definition
Behaving in an overly confident or presumptuous manner, as if one has ownership or authority over a place or situation.
自以为是
He walked into the meeting room as if he owned the place, completely disregarding everyone else's opinions.
他走进会议室，好像自己是主人一样，完全无视其他人的意见。
She opened the fridge as if she owned the place the moment she arrived at my house.
她一到我家就打开冰箱，好像自己是主人一样。
He was loudly ordering the staff around as if he owned the place.
他大声地对员工发号施令，好像自己是老板一样。