attitudinize
/ˌætɪˈtjuːdɪnaɪz/
/ˌætɪˈtjuːdɪnaɪz/
verb
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To assume an affected, unnatural exaggerated attitude or pose.
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To cause to assume a pose.
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To give the appearance of, make a show of by posing.
Synonyms:
posturize