it is saying that the wok is killing him and he is not happy with it. He is comparing his tie that he wears to work to a noose(the loop on the end of the rope to hang someone with).it shows the attitute towards life and existence.
Pi respects the importance of work, however finds much
more value in the beauty of life itself. Pi believes that to
ignore the offerings of life and to focus too much on work is
detrimental to one’s health