画が像ぞう掲けい示じ板ばん

Meanings

1

imageboard

An Internet forum where users post images and comments, often anonymously. Common in Japanese online culture.

板ばん

は

匿とく

名めい

で

書か

き

込こ

める

。

You can post anonymously on that imageboard.

plank, board, plate

掲けい示じ板ばん
掲示板 is a general bulletin board or forum, while 画像掲示板 specifically focuses on image posting.
電でん子し掲けい示じ板ばん
電子掲示板 (BBS) is a broader term for any electronic bulletin board; 画像掲示板 is a subtype centered on images.

Compound of 画像 (image) and 掲示板 (bulletin board), directly calqued from English 'imageboard'.