From Longman Dictionary of Contemporary Englishpeakypea‧ky /ˈpiːki/ adjective British English informal MIDCBlooking pale and ill SYN peaked American English He’s looking a bit peaky today.
Examples from the Corpus
peaky• For a Health Secretary he looked pale and peaky.• Lesley-Jane looked strained and peaky and her performance was once again subdued.• You look awfully peaky and you've hardly eaten a thing.• So, we're feeling a bit peaky are we?• My familiar, peaky little face.• You have a sit down, love, you look peaky to me. 