Arospike is a romantic orientation on the aromantic spectrum. It is defined as someone who usually feels no romantic attraction, but occasionally has rare, sudden, and intense spikes of romantic attraction for a short amount of time, before returning, just as suddenly, to one's normal amounts of aromanticism. Arospike can be a romantic orientation on its own or can combined with other orientations. For example, one could be arospike and homoromantic, meaning that when one does experience romantic attraction it's only towards people of the same gender.
The sexual counterpart to arospike is acespike. Being both acespike and arospike makes someone aroacespike.