looking through own legs
Bending down and looking at the viewer through one's own legs. Frequently seen when a character is standing up, with their head and torso fully bent forward so they are looking behind them upside-down. There are other possible poses, such as Danbooru post #3323448, Danbooru post #2860988, and Danbooru post #3320641.
This is not the same as view between legs since that tag refers to the viewer's perspective. This tag refers to the character's perspective. The tags are not exclusive however as shown in Danbooru post #3155529.