Pulling on her weave, it's that Andrew Auernheimer
Weev is the Internet Pseudonym of Andrew Auerheimer, an American greyhat hacker and Internet troll. Gambino is also having a bit of some good ol' wordplay on the word “weave."
(The words "Weev” and “weave” are homophones: they sound the same but have different meanings.)
He’s also saying a girl pulling on her weave is that “Andrew Auernhiemer” because she’s trolling, acting as if her hair is real.
To help improve the meaning of these lyrics, visit “Life: the biggest troll [andrew auernheimer]” by Childish Gambino Lyrics and leave a comment on the lyrics box