toe-curlingly
adverb/ˈtəʊ kɜːlɪŋli/
/ˈtəʊ kɜːrlɪŋli/
(informal)- in an extremely embarrassing way because of being very bad or silly
- a toe-curlingly awful movie
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toe-curlingly
Definition of toe-curlingly adverb from the Oxford Advanced Learner's Dictionary