a period of time that has been going on for 5 years and is probably going to go on forever.
friend 1: one direction broke up, right?
directioner: OF COURSE NOT! THEY'RE JUST ON AN 18 MONTHS HIATUS.
by niall's new angel March 9, 2021
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2016~

Friend: are you excited for 18 months?
Me: yes of course!

2021~

Me: well since when was 18 months 5 years 😩
by Katiexoxo467 January 15, 2021
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A phrase said by one direction, the boyband. Meaning an indefinite amount of YEARS
Tod:how many years is 18 months
Emily: 2 and a half of course 🤪
Me: we shall never know 😔
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proof that one direction left school at an early age. 18 months somehow equals 6 god damn mf years
1d: yeah we’ll definitely be back it’s just a hiatus for about 18 months

me: bitch 18 months my ass
by lou’s5ft9inch December 3, 2021
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18 months definition: A different way to say 3 years and probably longer. Origin: One Direction
"Can someone remind One Direction of the fact that their 18 month hiatus ended 12 months ago?"
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So 18 months= 3 years cuz 1+1=carrot.
by lolurnotharrystyles June 13, 2018
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18 months is what means 5 years in the one direction fandom, because the boys said that they'll be back in 18 months but guess what? They didn't.
"Omg! I'm gonna be 18 in 18 months!"

"You are just 13"

"No, dummy I mean that I'll be 18 in 5 years"
by This is my real name fuck you February 26, 2021
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The 5 dreamy boys who don't know what the fuck 18 months mean!
Directioner: Oh! They're so cute! How old are they?
Random: 18 months.
Directioner: 5 years? Ok.
by LilyG_1D May 1, 2021
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