What is Gerrard's Sock?
1.
Technically, a receptacle used to collect semen (usually, but not exclusively, human) excreted through acts of either auto-erotica or independent stimulation.
More commonly, a wank sock.
Colloquially employed as an term of reference when referring to the producer of a certain Saturday early evening broadcast on BBC Radio 4. Whose name rhymes with hymen. Which is apt as he is a bit of a cunt.
That Simon, he's a right Gerrard's sock.
Often truncated to -
That Simon, what a sock.
Can be used in combination with any variety of terms -
What a fucking sock.
Or even as an adjective -
What a socking tool.