YW is an internet slang acronym that primarily stands for "You're welcome." It is commonly used as a quick, polite response to someone saying "Thank you" (TY) in text messages and online conversations

. In some contexts, YW can also mean "yeah, whatever," which is a more dismissive or sarcastic usage, but this is less common and depends on tone and context

. Overall, YW is a concise way to acknowledge gratitude, especially popular among teens and young people in digital communication