The 26-year-old said he wanted to be inked with the name of his latest single but was pranked by Oscar-nominated actress Saoirse Ronan.
The pair filmed a music video for the track in Ireland last week.
"When we were filming it, I meant to get a tattoo of her handwriting saying Galway Girl," he told fans at his show in Glasgow on Sunday.
"It actually says Galway Grill. G-r-i-l-l."
Ed Sheeran said he was proud of who did it and said it was the kind of thing he'd do.
"Like, full on, she really took the [rip] out of me with this one."