Casing

[Sarah]

Or casing sausage, is when you get out of the pool and your shorts are sticking to your legs so tight that it looks like they vacuumed sealed your penis, and it becomes a very visible outline.

[Justin Bieber]

Used to describe the action of checking a [girl out] with the intention of being [inconspicuous] but being completely obvious. Derived from the slang term, [casing the joint].

[Zipporah Schumaker]

A cover or shell that protects or encloses something.