It's the first time she's actually used his name and she blasted him late Thursday, saying ... "Yes, this n***a Tory shot me. You shot me, and you got your publicist and your people to these blogs lying and s**t, stop lying!"
Megan also denied rumors she had hit Tory during an argument inside the SUV last month in the Hollywood Hills -- but admits there was an argument between everyone in the vehicle, and that's why she tried to walk away. She alleges that's when Tory opened fire.
As you know, up to this point, she'd insisted she was shot -- and certainly hinted Tory pulled the trigger -- but never said his name. During the IG Live post, she said she was afraid to call out Tory to the LAPD because she "didn't want to die" -- clearly insinuating she feared the police during the heated interaction.
She also addressed rumors the argument had something to do with Kylie Jenner. They'd all been partying together a home in the Hills prior to the shooting.
TMZ broke the story ... Tory, Megan and one of her friends left the party after 4 AM in a chauffeur-driven SUV, and police responded to calls of shots fired.
When they pulled over the vehicle, Megan was bleeding from her feet as police instructed her to slowly walk backward. Tory got arrested for possession of a concealed weapon -- a handgun was under his seat -- and Megan was taken to a hospital for treatment.
Megan's bold move to publicly accuse Tory comes the day after she posted pics of her injuries, and continued to insist she'd been shot ... no matter what haters were saying online. However, she still refused to say Tory's name, and even went so far as to say her back was turned when she got shot ... hinting she never saw who did it.
Since then, something definitely pissed her off, because shortly before she went live on IG ... she went tweeted a thinly-veiled threat to call out Tory if he kept lying.
We've reached out to Tory's camp, but no word back yet.