EXHIBITIONIST
exhibitionist, show-off
(noun) someone who deliberately behaves in such a way as to attract attention
exhibitionist, flasher
(noun) someone with a compulsive desire to expose the genitals
Source: WordNet® 3.1
Etymology
Noun
exhibitionist (plural exhibitionists)
One who attempts to draw attention to himself or herself by his or her behaviour.
One who exposes his or her genitalia (or female nipples) in public.
synonym of exhibitioner
Synonyms
• (one who exposes him/herself in public): flasher
Adjective
exhibitionist (comparative more exhibitionist, superlative most exhibitionist)
compulsively seeking attention
Source: Wiktionary