- The upper part of the buttcrack is visible above the clothing while the rest of the butt remains covered. This can also occur when a garment has an opening or slit that allows the buttcrack to be seen, rather than being exposed above the clothing.
- It can occur in any context, regardless of the situation or the character's clothing.
- The conditions for butt_cleavage are met.
- The character is working or wearing clothing associated with a job.
- The situation represents the cliché of a worker's buttcrack being exposed.
When a situation meets the conditions for plumber's_crack, it can also be tagged with butt_cleavage, as the former describes a specific context of the latter. The character's posture does not determine which of the two tags applies; they may be standing, crouching, leaning over, etc.