Aliasing in → invalid_tag
Link to alias

Reason:

Not sure of the purpose of this one, and doubt it has a purpose. Initially assumed it was corrupted from cum_inside or a related tag, except it was also on non-explicit images. I've removed it from the images I've seen using it, but the number is seemingly a little higher than the amount of images which showed.

UPDATE: "out" should also be invalidated, for much of the same reason.

EDIT: The tag alias in -> invalid_tag (forum #269877) has been rejected by @bitWolfy.

out should be invalidated too

Ruikuli said:
out should be invalidated too

Definitely. I've updated my OP to include it. I see 54 images tagged with that (but apparently there's 63? It's not my blacklist doing that, either), which is way more than were tagged "in" (less than 10). I'll get to work on removing them, though am not entirely sure what might have caused that.
It seems to be related to tongue_out. Must be a case of users inputting a space instead of an underscore.

AgentParadox said:
Definitely. I've updated my OP to include it. I see 54 images tagged with that (but apparently there's 63?

probably includes bunch of the deleted posts

In any case, it's now been removed from all posts, substituted for tongue_out or whatever else when necessary.

The bulk update request #1960 is active.

change category in (3) -> invalid
change category out (1) -> invalid

Reason: The tags are back in use again, still should be invalidated. This BUR puts both in the invalid category rather than aliasing to invalid_tag.

EDIT: The bulk update request #1960 (forum #326320) has been approved by @bitWolfy.