In this case, having trash throws in dreams indicate feelings of overwhelm, anger, or fear, points to your relationship with you feel about her/him.
Dreaming of someone throwing trash also mean that certain aspects of your life need cleaning or removal, an evidence for immaturity and inexperience. It mean breaking away from negative relationships or old habits to make room for positive change, you need to be more willing to experience new things.
Dreaming yourself throwing the trash indicate shame or guilt, an evidence for the division between the subconscious and conscious. It mean that you perform unhealthy actions or make decisions that negatively affect your life, unfortunately an admonition for your outdated surroundings and thinking.
If in your dream you break up with someone who throws garbage, it a symbol of the need to end toxic relationships or situations, a clue for your need to things at an extreme level. It is important to take a step back in your life and decide what is best for you and your background, a message for all of your past experiences – both positive and negative.
To sum up, a dream in which someone throws garbage often symbolizes emotional distress, the need for cleaning, and feelings of shame, something or someone in your life is trying to squeeze every bit of energy or information out of you. It is important to pay attention to the details of your dream and the feelings it evokes in you in order to get a comprehensive interpretation, a message for you calling into a specific field of work or an area that you need to devote more study to.