A slogan is used in Scottish heraldry as a heraldic motto or a secondary motto. It usually appears above the crest on a coat of arms, though sometimes it appears as a secondary motto beneath the shield. The word slogan dates from 1513, though it is a variant of the earlier slogorn, which was an Anglicisation of the Scottish Gaelic sluagh-ghairm.
The word slogan dates from 1513. It is a variant of the earlier slogorn, which was an Anglicisation of the Scottish Gaelic sluagh-ghairm (sluagh "army", "host" + gairm "cry"). Slogans are used in heraldry, most notably in Scottish heraldry. In Scottish heraldry slogans are used as mottoes, or secondary mottoes. Slogans usually appear above the crest on a coat of arms, though sometimes they appear as a secondary motto beneath the shield. There may be several possible origins for mottoes used in heraldry, however slogans are considered to have originated from battle cries or war cries. There are several notable heraldic mottoes which are thought to originate from a war cries. For example, the Royal coat of arms of the United Kingdom contains the motto DIEU ET MON DROIT ("God and my right") which has been thought to originated as a war cry. As has the motto MONTJOYE SAINT-DENIS which appeared on the former French coat of arms (this motto is refers to the oriflamme, the royal standard of the kings of France, which was kept in the Basilique Saint-Denis). Several mottoes found in Irish heraldry, which end in a boo, are also thought to have originated as war cries. Examples of such Irish mottoes are CROM A BOO of the Fitzgerald earls of Leinster; and SHANET A BOO of the Fitzgerald earls of Desmond.