The slang acronym IMY means "I miss you." In this context, the word "miss" refers to feeling sadness over the absence of someone or something.
As well as using the acronym in texts, "I miss you" can be said in other creative ways. Some people like to use others' words and find appropriate quotes such as, "If I had a single flower for every time I think about you, I could walk forever in my garden."
Translations for "I miss you" include "Te echo de menos" or "Te extraño" in Spanish, or "Tu me manques" in French.
Although it is generally clear what IMY means in the context of a text, other contexts of IMY may also stand for "Indira Mahila Yojana," an Indian women's rights group, or "International Metal Yachts."