[1] Pizzle is a Middle English word for penis, derived from Low German pesel or Flemish Dutch pezel, diminutive of pees, meaning 'sinew'. The word is used today to signify the penis of an animal, chiefly in Australia and New Zealand.

[2] Interestingly, it is used in medical slang (Dictionary of medical slang -Jacob Edward) and it is defined as exhausted, or to its point:

~ Pizzle chewer ... A female who relieves a male of his phallic tension by fondling the instrument in her mouth.

~ Pizzle-grinder ... 1. A butcher. 2. A prostitute.

~ Pizzle honker ... A prostitute who satisfies her patrons by manual friction.

~ Pizzle warmer . . . The pudendum muliebre, esp. the vagina.

~ Pizzled . . . Exhausted physically or mentally.

So I guess you could say that Pocket is a Fizzled[3] Pizzle.

[1] https://en.wikipedia.org/wiki/Pizzle [2] https://english.stackexchange.com/questions/166295/etymology... [3] Fizzle: To finish slowly in a way that is disappointing or has become less interesting & There is often an initial indication of interest, but then it fizzles out and no cash materialises. https://dictionary.cambridge.org/dictionary/english/fizzle