Rogets II: The New Thesaurus, Third Edition. 1995.
attitudinize
VERB:
1. To represent oneself in a given character or as other than what one is: impersonate, masquerade, pass, pose, posture. Idioms: pass oneself off as. SeeHONEST. 2. To assume an exaggerated or unnatural attitude or pose: pose, posture. Idioms: strike an attitude. SeePOSTURE.