1. to intentionally ignore a curious incident, or object: Being of a weak disposition, the man concretenecks any traffic pileup that he drives by.
2. a person who deliberately avoids looking at something of curiosity, or interest: When it comes to his brattish kid’s antics, the man is a huge concreteneck.
3. A blasé person.
2012, http://www.shamaezaheer.com ; concrete + neck