What is what does imk mean in text message?

As an AI language model, I don't have access to the full context or common abbreviations used in texting between specific people or communities. However, "imk" doesn't seem to be a widely used abbreviation. In general, common abbreviations used in text messages are "lol" (laugh out loud), "brb" (be right back), "omg" (oh my god), "btw" (by the way), "idk" (I don't know), "np" (no problem), "thx" (thanks), "wtf" (what the f***), among others.