It is sometimes difficult to make a hard-and-fast judgement of what is uncivil and what is not. Such a judgement may need to take into account such matters as (i) the intensity and context of the language/behavior; (ii) whether the behavior has occurred on a single occasion, or is occasional or regular; (iii) whether a request has already been made to stop the behavior, and whether that request is recent; (iv) whether the behavior has been provoked; and (v) the extent to which the behavior of others need to be treated at the same time.
The following behaviors can all contribute to an uncivil environment:
1. Direct rudeness
- (a) rudeness, insults, name-calling, gross profanity  or indecent suggestions;
- (b) personal attacks , including racial, ethnic, sexual, gender-related and religious slurs, and derogatory references to groups such as social classes or nationalities;
- (c) ill-considered accusations of impropriety;
- (d) belittling a fellow editor, including the use of judgmental edit summaries or talk-page posts (e.g. "that is the stupidest thing I have ever seen", "snipped crap");
2. Other uncivil behaviors
- (a) taunting  or baiting : deliberately pushing others to the point of breaching civility even if not seeming to commit such a breach themselves. All editors are responsible for their own behavior in cases of baiting; a user who is baited is not excused by that if they attack in response, and a user who baits is not excused from their actions by the fact that the bait may be taken;
- (b) harassment , including Wikihounding , bullying, personal or legal threats, posting of personal information, repeated email or user space postings;
- (c) sexual harassment 
- (d) lying;
- (e) quoting another editor out of context  to give the impression they hold views they do not hold, or to malign them;
In addition, lack of care when applying other policies can lead to conflict and stress. For instance, referring to a user's good-faith edits as vandalism  may lead to their feeling unfairly attacked. Use your best judgement, and be ready to apologize if you turn out to be wrong.