Rebus writing substitutes pictures or symbols for words, but not in the same way that pictograms do. With pictograms, a picture of, for example, a bee simply represents the insect. But in rebus writing, a picture of a bee is used to substitute for the letter b or its sound... a picture of an eye represents the letter i, and so on.

In other words, text speech or a variant on modern emoji speech. Cool/❄ 😄