<P> To have a chip on one's shoulder refers to the act of holding a grudge or grievance that readily provokes disputation . </P> <P> It can also mean a person thinking too much of oneself (often without the credentials). </P> <P> "A chip on the shoulder" comes from the ancient right of shipwrights within the Royal Navy Dockyards to take home a daily allowance of offcuts of timber, even if good wood was cut up for this purpose . The privilege was instated as a prescriptive right from 1634 . By 1756, this privilege had been abused and was costing taxpayers too much in lost timber for warship repair and construction . The decision was then made by the Navy Board to limit the quantity a shipwright could carry home . A warrant was issued to the Royal Dockyards to reduce the quantity of chips by ordering shipwrights to carry their bundles under their arms instead of on their shoulders, as one could not carry as much timber in this fashion . The specific incident from which the expression derives is as follows: </P> <Table> <Tr> <Td> "</Td> <Td> Master Shipwright and his Assistant, Chatham Dockyard, to Navy Board, 17 June 1756 . <P> On Tuesday a petition was brought to the Honourable Thomas Cooper, Esq., Commissioner of this yard, by John Bissenden and Robert Woodriff, shipwrights, in behalf of the whole body of shipwrights, relating to their carrying chips out of the yard on their shoulders . The next day the Commissioner sent for them in the presence of the Master Shipwright and the First Assistant and represented to them the ill consequence of such proceedings, and read to them your Honourable Board's warrant of the 4 May 1753 on which the said two men withdrew the petition and said they would talk to all the people and believe everybody would be satisfied with what had been said to them . And in the afternoon the Master Shipwright sent for all the foremen and quartermen and read the Order to them of the 4th May 1753, and give every quarterman a particular charge to tell all his men separately what the order was relating to their lowering their chips and carrying them under their arm out of the yard . </P> <P> This day at twelve of the clock some few of the workmen about one hundred and fifty came up first to the gate without any chips, afterwards about twenty more came and lowered their chips agreeable to the Board's warrant . Then came John Miller, shipwright, about thirty feet before the main body of the people, on which the Master Shipwright ordered him to lower his chips . He answered he would not, with that the Master Shipwright took hold of him, and said he should . He, the said Miller replied,' Are not the chips mine? I will not lower them .' Immediately the main body pushed on with their chips on their shoulders, crowded and forced the Master Shipwright and the First Assistant through the gateway, and when out of the yard give three huzzas . </P> </Td> <Td>" </Td> </Tr> </Table>

Where did the saying chip on your shoulder come from