A term used by people of high political status, such as a mayor, a
chief, a selectman, a representative, a president, what have you. This term is commonly used to be synonymous with "I have to
poop", but this version is used to make conversation less
awkward.
Barack Obama leaned over to
Vladimir Putin during an interview and
said "Pardon me, I have to uuuuh...
well, let's just say I should be passing legislation."