Origins of some idioms

pay through the nose http://www.phrases.org.uk/bulletin_board/14/messages/63.html

throat full of frogs http://www.phrases.org.uk/bulletin_board/48/messages/385.html

put foot down http://idioms.thefreedictionary.com/put+foot+down

split our sides http://idioms.thefreedictionary.com/split+sides