Somone who lives their life according to fate, accepting the outcomes as the only possible course of events, and does not think about what MAY have been IF something else happened.

Opposite: un-fater
it is easier to exemplify un-fater:

person 1: "If I bought that lottery ticket I would have been able to go on a huge overseas holiday"
person 2(fater): "You are SUCH an un-fater"
by David Bellingham June 12, 2008
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Fater, Darth Vader's lesser known cousin. Has a high pitched voice, is tall and lanky, uses the phrase "Who's your daddy"
My Lord Vader is your lesser none cousin Fater coming over for dinner?
by cfunkplay December 11, 2018
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Fater - pronounced FATE-ER, someone who hates fat people, makes fun of fat people, and is generally displeased with the overweight community.
Girl 1: "Did you see that beached whale walking down the street? I mean, she could really stand to lose more than a few..."

Girl 2: "You're such a fater!"
by Hogwash January 20, 2006
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A self-professed Fan of a sports team who seems to actually Hate that same team. Fan + Hater = FATER. This person is most likely employing a defense mechanism against the sting of defeat by being so down on everything the team does. The largest collection of Faters can be found on message boards devoted to their favorite team. After big wins, Faters cite overwhelming evidence that it was pure luck. After tough losses, Faters crucify the players and coaches. Invariably, Faters hate the team's star player the most.
Fan: Hey man, big win for the team last night!
Fater: Yeah, they got lucky.

Fan: We won by 30 points.
Fater: Yeah but it should have been 40. "Star player" is awful and he shoots too much.
Fan: He shot 60% and scored 35 points.
Fater: Yeah, but did you see how long his shorts were though? We are never going to win a championship with shorts like that. We probably won't win another game all year.
by dawgfan91 December 13, 2010
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A combine mixture of earth. water. fire. and air.
fater is a very powerful thing that can defeat anything in its path almost like god.
by sciFUtretre July 8, 2020
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an un-fater is someone who considers all the what would have beens, and does not recognise that there is only one possible sequence of events through time.
an un-fater would say: "If I caught that bus I would have been on time for work"

whereas a fater realises that this option should not even be considered as fate would have it that the next bus is to be caught as there are infinite unforeseen events that could occur.
by David Bellingham June 12, 2008
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