IPA: /ˌɛksɪbɪˈʃənɪstɪk/
KK: /ˌɛksɪbɪˈʃənɪstɪk/
Having a tendency to show off or attract attention to oneself, often in a way that is excessive or inappropriate.
His exhibitionistic behavior at the party made everyone uncomfortable.
Exhibitionistic → It is formed from "exhibit" (from Latin "exhibere", meaning to hold out or present) and the suffix "-istic" (meaning pertaining to or characteristic of). The word describes a tendency to present oneself or one's actions in a way that is intended to attract attention.
Think of someone who 'presents' ('exhibere') themselves in a way that is 'characteristic' ('-istic') of seeking attention.
No commonly confused words.