Bastard Sock
When you are done washing and start folding your clothes, there is always one sock without a partner. This sock left behind is known as a bastard sock. Some households keep bastard sock piles/baskets, giving temporary shelter to socks that have become bastards until they can be reunited with another matching sock.
Goddamnit! I know I washed 3 pairs of socks, but now all I have is 2 pairs and one bastard sock.