Don't know the first two. The only reference I can find to High fore is in the context of a 8-meter high fore bridge collapse. In that case, the high belongs to the 8-meter, and the fore bridge was a part of the bridge before it crosses the water.
3.Bosom Friend - a very good, dear, close friend.
4.Cold War - that period of (1945-1989 or so?) when the then two Superpowers had the power to destroy us all, but did not.
5.Pink of Health - very healthy. Has nothing to do with colour.
It means, the very peak of something. Shakespeare used it thusly, in R&J:
Mercurio: Why, I am the very pinke of curtesie.
Student or Learner