'slimy' originates from Old English, specifically the word 'slīmig,' where 'slīm' meant 'slime.'

'slīmig' changed from Old English word 'slīmig' and eventually became the modern English word 'slimy'.

Initially, it meant 'covered with slime,' but over time it evolved to include a moral connotation of 'dishonest or repulsive.'