"Going pit a pat" is an idiom that means a person's heart is beating quickly, often due to nervousness or excitement. There are a few synonyms for this phrase such as "pounding heart," "racing heart," "rapid heartbeat," and "fluttering heart." These phrases are commonly used to describe the physical sensation one feels when they are anxious, scared or agitated. These synonyms can be used in various scenarios like before an interview, while skydiving or even while proposing to someone. These words accurately define the feeling and can convey the emotion in a much better way, making the communication more effective.