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Phrase(s): hunch up
to squeeze or pull the parts of one’s body together. • He hunched up in a corner to keep warm. • Why is that child hunched up in the corner?, Phrase(s): hunch something up
to raise up or lift up some body part, usually the shoulders. • He hunched his shoulders up in his effort to get warm. • He hunched up his shoulders to keep warm.
McGrawhill's American Idioms And Phrasal Verbs