leath·er·neck 
(lĕthər-nĕk′)
(lĕthər-nĕk′)n.
Slang
Slang
A member of the US Marine Corps.
[From the leather neckband that was once part of the uniform.]
- overcloud
- overcoat
- overcoating
- overcome
- overcommit
- overcommitment
- overcompensate
- overcompensation
- overcompensatory
- overconfidence
- overconfident
- overconfidently
- overcorrect
- overcorrection
- overcritical
- overcritically
- overcrop
- overcrowd
- overdevelop
- overdevelopment
- overdiagnose
- overdiagnosis
- overdo
- overdoer
- overdog