An opening at the front of a garment which exposes cleavage. It is a specific type of opening that closes at both the upper and lower edges, in the same layer of clothing. The presence of a cleavage cutout on an outfit does not necessarily mean that the character wearing it has cleavage to begin with.
The following tags are aliased to this tag: heart_cleavage_cutout, cleavage_window, and tit_window (learn more).