peace pipe 
noun
A tobacco pipe offered and smoked as a token of peace among North American Indians.After a full afternoon, they sit down for supper, but realize that they must smoke a peace pipe to end their Indian battles....
- The two arch-rivals have been trying to smoke the peace pipe ever since Jamali seized the initiative and spoke to his Indian counterpart earlier this week.
- Above the clasped hands are a peace pipe and a tomahawk.