See Also:

tin hat (iou)



tin hat noun & adjectival phr. slang. E20.
[from TIN adjective + HAT noun.]
A. noun phr. A metal hat; esp. (Military) a protective steel helmet. E20.
put the tin hat on = put the lid on, put the tin lid on s.v. LID noun.
b. adjectival phr. In pl. Drunk. Chiefly Military. E20.
tin-hatted adjective wearing a metal helmet or helmets E20.