deep–six 
/ˈdi:pˈsɪks/ verb
deep–six·es; deep–sixed; deep–six·ing /ˈdi:pˈsɪks/ verb [+ obj] US, informal : to get rid of (something) : to no longer use or consider (something)
▪ The government plans to deep-six [=eliminate] the program next year. ▪ The committee deep-sixed the plan.
▪ The government plans to deep-six [=eliminate] the program next year. ▪ The committee deep-sixed the plan.
