The phrase "did top your head" means to come up with something quickly without much thought. Synonyms for this phrase include "off the cuff," "spontaneously," "impromptu," "on the fly," "by the seat of your pants," "instinctively," "intuitively," "without premeditation," and "recklessly." These terms all describe a sudden burst of inspiration or creativity, often without much planning or preparation. Whether you're brainstorming ideas for a project or improvising a solution to a problem, these synonyms for "did top your head" can help you express your thoughts and ideas more effectively.