What does he mean?

Justin Bieber’s social media activity continues to baffle fans, with the “Baby” singer changing his Instagram name on Thursday.

Instead of the @justinbieber handle the Grammy winner, 31, has had for years, his account is now @lilbieber.

The pop star did not draw attention to the name change or give any further context.

He did, however, hint at the update on Tuesday when he posted black-and-white photos cuddling his and Hailey Bieber’s 10-month-old son, Jack.

“lil bieber,” the songwriter captioned the social media upload, alongside a lock emoji.

Justin’s rep has yet to respond to Page Six’s request for comment.

Social media users poked fun at the name change, referencing the brief period in 2014 when Justin’s username was @bizzle.

“Bro thinks he’s a rapper,” one X user joked, with another speculating about an “incoming mixtape.”

A third quipped that Justin is in his “Xila Maria River Red era,” referencing Britney Spears’ Instagram name.

Another urged Hailey, 28, to “come get [her] man.”

Justin and the model have been together on and off since 2016, getting married in 2018 and renewing their vows six years later while expecting their baby boy.

Jack arrived in August 2020.

Since the little one’s birth, Justin and Hailey have sparked breakup rumors, only fueled by Justin’s social media activity — despite his wife’s insistence to Vogue that they are still going strong.

The American Music Award winner made headlines for Instagram uploads about “transactional” relationships and the “silent treatment” in recent months.

He shares on the platform frequently and racked up 12 in-feed posts on Thursday alone, including one of Jack sitting in a cardboard box full of balls.

Many of Justin’s uploads referenced the viral line from his expletive-filled screaming match with the paparazzi earlier this month, during which he said, “It’s not clocking to you that I’m standing on business.”

At the time, Justin also insisted, “I love my wife, I love my family and you provoke me and it’s sad.”