Potshot

[Justin Bieber]

A [contentious] remark or statement. Often [erroneous] and/or [irrelevant], too.

[Hina Muqadas]

A shot aimed at a person or thing that happens to be within easy reach.

[Gregory]

When you make a fresh [pot noodle] and put [your cock] In it and [spunk]

[Luis Fok]

The difficult art of [jizzing] in [somebodys] face when the lights are out.
Extra points are awarded if the result is still there when they wake up.
It is called a potshot because [darkness] causes inaccuracy in most cases

[Dave Paprocki]

While masturbating you have a bowl of weed packed next to you. When you are about to cum you stop, [hit a bowl] of weed and begin to furiously masturbate. [You blow] your load and then [blow out] your hit.

[Julian]

a shot that is fired carelessly or with little preparation: