The tag alias #70198 triangular_anus -> y_anus is pending approval.
Reason: both describe the same kind of anus. y_anus is currently the more populated by a landslide at 4K posts, but triangular_anus still has a non insignificant 138 active as of writing
the reply immediately below this OP will contain a competing y_anus -> triangular_anus alias for those who think it should go the other way around