negotiate for the release of some chocolate hostages
To have a rather large bowel movement, especially if one has been constipated.
"Ooh! That coffee and cigarette are really doing the trick. I have to go the the bathroom and negotiate for the release of some chocolate hostages."
Negotiate the release of some chocolate hostages
The act of forcing oneself to defecate following a period of constipation
Blimey, I'm going to have to negotiate the release of some chocolate hostages