Definition of throw something off in US English:

throw something off

phrasal verb

  • 1Rid oneself of something.

    ‘he was struggling to throw off a viral-hepatitis problem’
    • ‘So, after that I decided to throw them off and I haven't used them since.’
    get rid of, cast off, discard, shake off, drop, jettison, free oneself of, rid oneself of
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  • 2Write or utter in an offhand manner.

    ‘Thomas threw off the question lightly’