An icicle hanging on one's nose is a simple sort of humour in any case.
I have seen a great army thaw away like an icicle in the sunshine.
Jed was conscious of a cold sensation, like the touch of an icicle, up and down his spine.
Thou art hot-tempered and boyish, but I am cold as an icicle.
He doesn't say for how long, and acts the icicle in the presence of others.