thanx

Thanx is an informal spelling of the word thanks, used to express gratitude. It appears primarily in casual writing, text messaging, social media, and branding. While widely understood, it is considered nonstandard in formal writing.

The form derives from a phonetic simplification of thanks, replacing the "cks" with the letter "x" to evoke the same sound. Other variants common in digital communication include "thx" and "thnx."

In dictionaries, thanx may be listed as an informal or slang variant, with notes that it should be avoided in formal contexts. It is used by speakers of various English dialects and has appeared in popular culture as song titles, brand names, and casual online communication.

Because of its informal status, thanx is best reserved for casual contexts, while "thanks" or "thank you" remains appropriate in professional and academic writing.