spitting image
Concise Oxford English Dictionary © 2008 Oxford University Press:
spitting image
▶noun (the spitting image of) informal the exact double of.
– origin C19: orig. as the spit of or the spit and image of; perh. from the idea of a person apparently being formed from the spit of another, so great is the similarity between them.
'spitting image' also found in these Oxford entries:
