crotchety

/ˈkrɑtʃəti/
adjective
  1. Easily annoyed or irritated, especially because of old age; bad-tempered.
    • My grandfather gets a bit crotchety if he doesn't take his afternoon nap.
    • The customer was crotchety and complained about everything.
    • The crotchety old man yelled at the kids for playing on his lawn.
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