it means subscribe to someone else's youtube account. You will then receive a notification every time they publish a new vid. People try to get more subscribers to their accounts.
- hey sub to me ill sub back

- sub me ill give u 4 subs and sub some of the pl on my channel and they will also sub u so all sub!
by alex alex alex December 11, 2008
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Abbreviated version of "subwoofers". Often installed in the vehicles of alpha males, yuppies, date-rape predators, and future hearing aid users.
"all this bass from these subs will hide my small dick."
by cyanide_nights April 24, 2010
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Someone you throw paper airplanes at, perform as a Tourette's child for, compliment on her dress and say you have one just like it (if you are male), and generally confuse and irritate. The ultimate goal is to either make the substitute break down laughing or reveal his/her shocking brain-dead-ness by convincing him/her that you really do talk like that.
"Wow, that sub we had in history was wearing a belt and suspenders."

"I sorry my acc-SCHENT. I haff P H D."
by iglaurah October 7, 2005
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Core language from High Wycombe, England.

Verb: 'to sub'
Meaning to go to Subway.
Colin: "Let's Sub it."
Lurse: "Blef."
or
Saxon: "I'm Subbing it."
Lurse: "Blef."
by Simjob March 30, 2005
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severely underdeveloped brain
"sub to my channel";
"sup." "sub.";
"your performance was suboptimal."
by nex_cz February 10, 2021
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Many desperate YouTubers with fewer than a thousand subscribers on their channel will subscribe to any channel just to gain an extra subscriber in exchange. This is regardless of how terrible the videos are. Unfortunately, some YouTubers who do have great talent, creativity, and wonderful video quality sink to the bottom of the Mariana Trench as hundreds of boring videos surface the Pacific islands.
Sub 4 Sub? I can't wait to see the latest crap!
by Gio Bandito February 25, 2015
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