Cock is a word with multiple meanings in English:
1. A male chicken (rooster)
2. Slang term for penis (vulgar)
3. The hammer of a firearm
4. To tilt or turn something (e.g. "cock one's head")
5. In British slang, a term of endearment (e.g. "Alright, cock?")
6. A leader or chief (archaic)