1. Pre-2000s, the word is used to describe a person (male) who is generally social and positive to friends, family, and anybody he associates. He is dependable, means well, and looks out for people he's close to.

In the dating pool. Some guys discovered they can come on too hard and be rejected, so they decided that if they become 'nice' and act friendly to the girl, she would grow to trust him and later allow him to take her. Even if she wasn't looking for a relationship or already has someone. Unfortunately, once he realises, the guy becomes resentful and views her as a slut for sleeping with one person she's committed to, or stupid enough to date a bad boy (note that any male that already claims his girl, regardless of look, criminal history (existing or nonexisting), or personality, will be the 'asshole').

Thus, they are people who always whine to themselves (at forums, to each other, or a hapless victim) wondering why, as they're such a 'Nice Guy'. It's become a word that's taken an ironic meaning.

2. An annoying self-designated third-wheeler who puts an unhealthy interest in a couple's relationship, but won't talk to or socialise with girl's own boyfriend. But will completely slam her to friends the minute he realises that she won't cheat/dump boyfriend, let alone do the 'pity-fuck' for him regardless if she feels chemically attracted to him or not. Thus causing a whole line of insults to be written about her online.

A young male who will give up countless hours of his time listening to the problems of his very attractive female friends because they need someone to talk to about their apathetic, Baywatch jock of a boyfriend because no one else will listen or genuinely care. Although always surrounded by beautiful girls the nice guy can’t get a girlfriend or even facilitate the alleviation of certain “drives” because his “ordinary” physical appearance will forever be compared to the Baywatch beach bum’s. The nice guy would never capitalize on a vulnerable girl, objectify or cheat on a girl, he will go out of his way and bend over backwards to help his “friends” and will never ask for anything in return but no matter how intelligent, understanding, humorous, compassionate, trusting or loyal the nice guy is the female cohort will always pass him up and endure any length of abuse, objectification, apathy and cold-heartedness from a man if he has physical attractiveness, fashion, big muscles and chiseled facial features.

The nice guy will eventually realize that his dependability and empathy will never be appreciated and all his friendships with females are all one-sided. This coupled with years of watching girls go for tanned, muscular jerk-offs with nice cars while he desperately hopes someone will realize that how viable he actually is will spawn and incubate the nice guy’s insecurities and he will eventually abandon his views, dumb-down his speech, take-up weight-lifting and sw...

A male who can't get a girlfriend, never mind get laid, because he DOESN'T treat women like shit.

A man who you can call late at night just because you're looking for someone to talk to. He would never speak ill of anyone, never harm a person unless absolutely necessary, never cheat and is always honest. Will help you move just because you're friends and doesn't ask for favors in return. Isn't sleazy and wouldn't take advantage of a person in a drunken or mourning state.

Often times, this nice guy doesn't have a girlfriend because women usually go for jerks and just make friends with the nice guy.

A man who has rejected the societal notion of masculinity and chosen to define himself from the inside out instead, realising that traits such as empathy and nuturing are not actually limited to the female of the species, and nor are aggression and assertiveness limited to the male.

Despite this newfound revelation, however, there is still a strong genetic predisposition for humans to continuously behave as if we were animals seeking out the alpha male with those genes most suited for surviving in a hostile environment.

Often times, the average woman, whom society encourages to indulge in her weaknesses and surpress her strengths, is a self-loathing masochist who may appreciate the nice guy's friendship and understanding, but feels no attraction toward him because his insecurities remind her of why she hates herself. Therefore, she almost always seeks the dominant, aggressive, unempathic male with whom she can vicariously live to make up for her weaknesses. Of course, this inidividual, commonly known as a jerk, is also usually an egotistical, disloyal, and shallow person for whom societal dictates of masculinity will force him to disregard his mate's feelings and treat her as if she were beneath him.

Feeling emotionally unsatisfied, the female will then turn to her nice guy friend, whom she has long since castrated, for comfort, and complain to him about how men ...

the person every girl will compare their would-be boyfriends to, for they possess every trait a woman desires. However, for whatever reason, women avoid them like the plague.

always finishes last

1. The man women call when there bitch-ass boyfriends treat them like shit, but they would never date because they are "too nice."
2. The "real men" who were always there for the women that they love, but always hear the following phrase. "Sure, (insert ex-boyfriend's name here) was a total jerk and cheater, but I wanna give it another try." See unrequited.
3. The guy in the office/classroom who catches shit from everybody, but still helps everybody out when they need him. Also, slow to anger.