![1girl absurdres arknights arm_up armpit_peek artist_name astesia_(arknights) blue_hair blue_skirt blush breasts bubble_tea_challenge cellphone chinese_commentary chinese_text cleavage closed_mouth dated drinking drinking_straw english_text grey_background halter_top halterneck head_out_of_frame highres large_breasts long_hair looking_at_viewer midriff phone signature simple_background skirt smartphone smile text_messaging translation_request upper_body v ygxdl rating:s score:24 post #3898265](/cdn_image/preview/3b/7c/3b7cf422fc93c8951240d2cb92d48a1d.jpg)
When a glimpse of a character's armpit is visible through a gap in their clothing. This tag implies that the armpit would not normally be visible except from a particular angle or due to the positioning of the character's body. Good examples of armpit peeks include post #61345 and post #588708.
For images where the character's armpit is uncovered but the inner portion of the armpit isn't visible, e.g. because the arm is lowered or the armpit is turned away from the viewer's perspective, use armpit crease.