Curse, used to express annoyance.

Oft unwearable socks whose sole purpose is to act as a semen receptacle.

This word can be used an as expletive but this is its secondary purpose. A fuck sock can come under two categories.
It is either a sock placed over the penis during masturbation;
or it is a makeshift condom when the chemist is just too far away.

A lame, pointless pocket on a shirt that serves no purpose.

Slang term for a wordcondom/word.

1) condom
2) wanking aid in the form of a footwarmer
3) inoffensive expletive