It was a 3-panel total thing of just this crazed-looking girl slaughtering some guys using a big battleaxe, i first saw it on ifunny where someone edited in the text that went someone along the lines of "axe cleaves, axe severs" or w/e but the last one was definitely "axe bites" like in pic related

and i strongly believe i remember the comments pointing to the source and it was just the one page by a guy on twitter and not part of an actual series

the face is the only part i can distinctly remember, i remember that each tooth was very defined and large and some even almost stuck out at odd angles. i don't think the head angle was quite like this, they may have been facing more straight on or just slightly left of the camera, it was def monochrome though like a typical manga