Contours

[Becky]

Contours refers to when you climb out of a swimming pool and your shorts cling to your crotch area giving a very accurate 3 [dimensional] impression of what your meat and 2 [veg] look like. Particularly embarrassing in large pools with lots of people. Can be avoided, but takes practise. Contours cannot be achieved in [speedos] for obvious reasons.

[Dorothey Allen]

the shape of a mass of land or other object, especially its surface or the shape formed by its outer edge: