A tweet (message posted on the website Twitter) that mentions a Twitter member without using their actual username. Usually employed for negative or insulting tweets; the person you're mentioning won't see the subtweet in their Twitter timeline as it doesn't contain the @ symbol that every Twitter username has.
Someone wants to criticize a person with the username @JohnDoe on Twitter but without that person seeing the tweet in their Twitter timeline. Instead of tweeting "I think @JohnDoe is an idiot" they would subtweet "I think JohnDoe is an idiot" or "I think John Doe is an idiot". In each case the @ symbol is missing so the tweet would not appear in @JohnDoe 's Twitter timeline.
by Bookley December 16, 2012
when that ratchet on twitter or instagram says something about one person but doesn't use their name so it's anonymous
subtweeted: "some people need to stop being so fake."
person it's about: "say it to my face lisa!"
by crabs snail February 14, 2017
Indirectly tweeting something about someone without mentioning their name. Even though their name is not mentioned, it is clear who the person tweeting is referring to.
Are you joking #sorude #subtweeting
by fridaymyday September 20, 2013
tweeting indirectly about someone without saying them or tweeting at them
Dan- tweeting indirects about your own problems as a cry for help xD :\

Cat- @dan stop subtweeting me pls.
by Phil is not on fire. September 7, 2015
A form of tweeting used only by pussies because they are too scared to @ someone
"Hey go check twitter I think Tina is subtweeting you." "Oh man, she's such a pussy"
by Jake kanjam June 4, 2014
It's the shortening of "subliminal tweet" which is directly referring to a particular person without mentioning their name or directly mentioning them and it basically indicates that the tweet in which the hashtag is used is a subliminal tweet.

Basically, it's talking about someone behind their back but sort of in their face on Twitter!
Man, I wish this girl would stop subtweeting about me and just say what she has to say directly. Triflin'!

I wish #oneofmyfollowers would stop #subtweeting and just come out with what he wants to say! Ugh!
by SubUrbanBruh August 10, 2010
When u go to subway and tweet about it
I went to subway and start subtweeting
by satchel1 September 8, 2014