LOS ANGELES, CA - JANUARY 18: Actor John Stamos attends the People's Choice Awards 2017 at Microsoft Theater on January 18, 2017 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for People's Choice Awards)

John Stamos knows how to up the ante.

The Fuller House star just took things to a whole new level in his prank war with Nick Jonas. For context, the two have consistently been posting photos of themselves either wearing or posing with some kind of memorabilia featuring the other.

Check out the evidence below:

It's your move @johnstamos #jonasbrothers #sucker Photos: Backgrid

1.5m Likes, 4,931 Comments - Nick Jonas (@nickjonas) on Instagram: "It's your move @johnstamos #jonasbrothers #sucker Photos: Backgrid"

I had the craziest dream last night... #jonasbrothers #sucker

458.3k Likes, 3,017 Comments - John Stamos (@johnstamos) on Instagram: "I had the craziest dream last night... #jonasbrothers #sucker"

But John Stamos took it to a new and hysterical level this weekend when he posted a photo of himself appearing to get a full-on tattoo of Nick Jonas’ face.

#jobrosforlife

528.5k Likes, 11k Comments - John Stamos (@johnstamos) on Instagram: "#jobrosforlife"

Stamos captioned the image “#jobrosforlife.”

Nick commented on the post writing “okay … okay …” His brothers Kevin and Joe were also hilariously shocked by the move, with Kevin writing “No way!!!!!” and Joe leaving a series of laughing emojis.

Whether the tattoo is real or fake remains to be seen. But either way, Nick Jonas’ next move will have to be pretty big to top this one!