A mouth full of gum that will not come out is read as words you cannot get out, or a feeling of being stuck in what you need to say. Dream books link it to blocked expression.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.