onepop 

To correctly do (achieve) on the first try.

one bullet, one shot.

nail on the head

onepop

onepop by dr.roil July 21, 2014

onepop 

an unreliable illegal firearm frequently used by the gangs of Britain.

Unreliable hence the name "onepop" as in it'll likely only fire once.

"don't slide on my block with a onepop"

onepop by yinged August 25, 2022

onetopicatatime 

Onetopicatatime is the accepting father figure of YouTube and other social medias. He is a hard worker and cares for everyone. He has been known to be wholesome, loving, and is the Keanu Reeves of YouTube.

"You are so onetopicatatime!"

"Awe, I don't deserve that title."

"You are amazing, you so do!"

onetopicatatime by RubyBlue2005 June 27, 2019

OneTopicAtATime 

OneTopicAtATime is an extremely wholesome YouTuber who covers different subreddits such as: r/suddenlygay, r/Traa, r/wholesomememes, r/LGBT and others...

He does collaborations with other YouTubers such as TheClick, OZmedia, JaminDoger and his YouTube group, SadMilk

OneTopicAtATime helped me through tough times with his over-positivity...

Me: Have you subscribed to our lord and wholesome saviour, OneTopicAtATime?
Friend: Who?
Me: We can no longer be friends...

OneTopicAtATime by AlexTheTransBoi August 24, 2020

onePOINTeight 

A common username for online forums usually pertaining to an automotive website. It has reference to the 1.8 liter DOHC engines found in most japanese vehicles. Also a well known Diablo II player who conquered most of US East realm.

"Dude did you see what onePOINTeight said in that thread?"

"nah, i bet he drives a Honda though"

onePOINTeight by IndigoSS August 27, 2009

One pop screamer 

A drinking lightweight, generally female; a person who gets crazy and libidinous after just one cocktail; an easy mark early in the evening at the local saloon; a cheap date easysluthocheap date

"That chick is all over that architect guy from Eastham.... What gives? We've only been here for fifteen minutes!"
"Yeah - that sucks - he managed to find the one pop screamer!!!!! Dude...."

One pop screamer by blabbermouth141 August 21, 2009

one pop

weed joint spliff j jabba marijuana
Small amount of cannabis in a little skin with a small amount of tobacco.

you smoking a one pop there?

yeahhh mannn!

one pop by superwomannn June 15, 2019