"chan," usually used in the plural as "chans," can refer to the large array of English-language websites that were inspired by the japanese imageboard 2channel. The largest and most influential of the "chans" is the popular website 4chan, although there are many other similar websites such as 7chan, 420chan, wakachan, iichan, not4chan, gurochan, fchan, sidechan, renchan, and so on and so on.

Their characteristic features are anonymous posting, content being quickly deleted once it becomes old, "sage"-ing, and an idiosyncratic and strange culture.

A caring boy, almost like a brother. Cute and hot at the same time, ‘korean’. Generous with a great sense of humour, always there for you.

A Cantonese surname.
In Chinese, Chen.

Affectionate and personal Japanese suffix, attached to a shortened version of one's personal name. In Japan, one never does this to anyone above them, only those lower or equal.

(in Lahnda, Punjabi, Dogri, Pahari, Panjistani, Poonchi language varieties) Moon

suffix: often "-chan" to flavor someone's name. Chan in Japanese is a term of affection and usually in the feminine. Cute boys, harmless best friends, and other girls might have "-chan" added to their names by people into the anime/manga scene. High pitched voice is optional.

A term in fan fiction- usually smut- to indicate that a character in the ship is underage, and still a child (under 18)