Definition of tying-up in English:

tying-up

Pronunciation /ˈtīiNGəp/ /ˈtaɪɪŋəp/

noun

another term for azoturia in horses
‘After a tying up episode the horse should be rested until the muscles have repaired.’
  • ‘Tying up seems to be more common in young Quarter Horses.’
  • ‘I just bought a Thoroughbred filly which was in race training, but retired without running because of recurrent bouts of tying-up.’