Definition of whip something out (or off) in US English:

whip something out (or off)

phrasal verb

  • Write something hurriedly.

    ‘you'll find the software ideal for whipping out memos and proposals’
    • ‘And, if you really want to whip out a note in a hurry, you can use one of our 12 samples in the back of the manual.’
    • ‘I just had to go whip out a note on my blog.’
    • ‘I whipped off a letter to the editor using their submission form and waited for the reply.’