The phrase "had a get together" refers to a social gathering or meeting. The antonyms for this phrase would be "disperse," "disband," "scatter," or "separate." These words indicate the opposite of getting together, meaning to break or dissolve a group. Other antonyms for the phrase could include "cancel," "defer," "postpone," or "call off." These words suggest that the planned gathering did not take place or was delayed for some reason. In certain contexts, antonyms for "get together" might include words such as "protest," "demonstration," or "conflict," indicating a gathering with a more confrontational or adversarial purpose.