I shall never get you put together entirely,
Pieced, glued, and properly jointed.
Mule-bray, pig-grunt and bawdy cackles
Proceed from your great lips.
The ‘you’ to which Plath is referring to, is  The Colossus a massive statue constructed by the people of Rhodes after they were victorious over Demetrius’ invasion of the city in 305 BC. It was a representation of the sun god Helios built on the Island of Rhodes in Greece. The statue only remained intact for approximately 50 years before an earthquake shook the city in 224 BC destroying it. Given the content of the poem and her many references to ancient Greek culture, it is safe to assume that Plath was referring to the specific statue the Colossus of Rhodes. 
 
 (Image portrayal of the Colossus standing over the city of Rhodes)
The Colossus