Thora Hird; Thora
noun
1
a third-class university degree. Rhyming slang, based on British stage and screen actress Dame Thora Hird (1911–2003) UK, 1998.
2
a turd, hence an act of defecation. Rhyming slang, based on the name of British stage and screen actress Dame Thora Hird (1911–2003) UK, 2002