1) Commonly, someone who is a repeat user of a product or service, regardless of the nature of the business.

2) In healthcare, someone who is frequently showing up for similar injuries or disorders. Often, this is applied specifically in the world of drug and alcohol rehabilitation (rehab) to somebody who has tried to get sober (clean up or dry out) but has had frequent relapses. According to current statistics, the majority of addicts (80%) are likely to relapse after the first try.
1)“You watch the register, I’ll take care of Mr. Jones. Don’t worry, I’ve already got his order. It’s the same thing every day. He’s one of our frequent fliers.”

2)“Looks like we’ve got Sandy back again. Room 5. Yup, heroin again. We’ve got her on some Seroquel and an Ativan drip, so at least she’s calm this time. She’s another one of our frequent fliers.”
by Nurse Kitten August 19, 2005
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Someone who is constantly high on cheap or unreliable drugs, such as Pot or Crack
Hey look at that high guy!
Yeah, he's a frequent flier
DAUMMN!
by BigBallsMcgee August 22, 2005
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Somebody who uses class A drugs often.

i.e is frequently flying
Is John ok, he looks like he needs an ambulance ?

No, he's used to this kind of thing, he's a frequent flyer.
by Dobby August 19, 2005
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Someone who has a lot of patience to go through airport security numerous amounts of times.
Damn, I don't know how a frequent flier can handle the tight security here.
by Logical Thinker August 19, 2005
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Someone who is constantly calling the police for the most ignorant or tedious reasons. Typically calls when no emergency exists.
"No big rush to get over there, they are frequent fliers."
by MB Mart--z February 5, 2003
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One who travels often by air, especially on one airline.
My stepdad is a frequent flier, he is a super gold level on his frequent flier account. At this rate he will never have to but another airline ticket again because he has so many frequent flier miles.
by Ash Evans August 19, 2005
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(FREE-kwent FLY-er) noun. someone who wants a discount or freebie because they purchase controlled substances from the same supplier on a regular basis
Sue: Hey, I want to buy another teener today. Could I have a discount as I am a frequent flier?

Sue: Since I am a frequent flier can I get this at half price?
by Nedd Ludd August 22, 2005
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