Tosses up refers to the act of throwing or flipping something in the air. However, there are several antonyms for the word tosses up. For instance, the first antonym is catching, which refers to someone receiving an object instead of tossing it. Another antonym is keeping, which is the act of holding onto an object instead of throwing it up in the air. Additionally, dropping is another antonym. Instead of throwing the object up, it falls down to the ground. Lastly, placing is an antonym for tosses up. Instead of throwing, one places the object in a specific location without any action of throwing it. In conclusion, tosses up has several antonyms, including catching, keeping, dropping, and placing.