plumber's crack

Noun

slang

(slang) An intergluteal cleft visible due to low-riding pants, especially when one is bending over.

Japanese Meaning

低位のズボンによって露出する、臀部の尻裂（俗語で用いられる表現）

When he leaned over to pick up the wrench, his plumber's crack was visible to everyone in the garage.

彼がレンチを拾うために前かがみになったとき、ガレージにいた皆にお尻の割れ目が見えてしまった。

Sense（1）

(slang) An intergluteal cleft visible due to low-riding pants, especially when one is bending over.

Very classy: visible thong and plumber's crack.