Definition of snot rag in US English:

snot rag

noun

informal
  • A handkerchief.

    • ‘Just don't leave your boots lying around again - I don't know which was worse, them or the snot rag.’
    • ‘She slipped the end of her staff beneath the snot rag and held it out to him.’
    • ‘I always will sneeze in my hands if I can not get my snot rag out in time!’
    • ‘Some students even brought me tissues and dropped them on their table, as if giving me a clue that my snot rag was something they couldn't accept.’