It's hard to be a troll when you're locked up.

But Tekashi 6ix9ine still managed to take a playful swipe at his haters in his first photo since the Feds took him away on six RICO and federal gun charges.

In the photo, posted by his girlfriend Jade, 6ix9ine -- who's rocking pig tails -- is grabbing Jade's butt.

He’s good luv , enjoy 😉❤️ #FreeDanny🌈

A post shared by  Snap👻 So_youjad3 (@__ohsoyoujade) on Jan 7, 2019 at 5:39pm PST

"He’s good luv , enjoy 😉❤️ #FreeDanny🌈," Jade captioned.

6ix9ine's lawyer was said to be putting together a bail package for the NYC rapper. But it's unlikely he'll be released before his trial, which will be sometime in the second half of 2019. (Providing he doesn't plea.)