What does 'JK' stand for in texts?

In texts, “JK” stands for “just kidding.” People add it after a playful, exaggerated, sarcastic, or deliberately misleading statement to signal that it should not be taken literally.

The abbreviation is a compact form of a phrase people commonly use in conversation when revealing that a comment was a joke. It became popular through internet chat, texting, forums, and social media, where written messages do not provide vocal tone, facial expressions, or timing to show whether someone is serious.

“JK” is closely related to “J/K” and “j/k,” which mean the same thing. It is not normally an abbreviation for “joking kudos,” “just know,” or “joking kind.” Context still matters: a message marked “JK” can soften a tease, but it does not automatically make an insensitive or confusing comment harmless. In formal work or academic communication, writing the full phrase is usually clearer.