Ejemplo:
The bus conductor could see that I had no money and that I was in a hurry, so he let me on the bus and did not ask for a ticket. He gave me a wink to let me know that he would not make trouble for me. 
Autorización de foto:
Licencia CC: Atribución, uso colmercial
Regionalism:
Neutral
Regional variant:
Neutral
Full Expression:
The “ink” Sound ( /ŋ/ + /k/ ) : wink
to close and then re-open one eye quickly, as a sign of friendship, physical attraction or complicity with someone