Grimes Reveals Massive Back Tattoo of 'Beautiful Alien Scars'

Grimes might not be of this planet ... that's one possible theory after dissecting her massive new back tattoo, which she describes as "beautiful alien scars."

The Canadian musician unveiled her body art Sunday, a painful-looking assortment of tangled lines that at first glance ... make you think her tattoo artist was just a little high.

Instead, Grimes says it was planned this way from the get-go... with white ink and some help from the "alien computer brain" of another designer.

She says this is the best photo she has so far because "it hurts too much and I need to sleep," adding ... "it’ll be red for a few wks , but gna be beautiful alien scars."

It's all right on brand for Elon Musk's partner and mother to their child, whom they initially named X Æ A-12 Musk ... Grimes explaining the X stood for "the unknown variable."

They later had to change the A-12 to A-Xii due to California law not allowing numbers, but were still able to keep the theme of their son's name ... which also includes aspects of artificial intelligence and their favorite aircraft.