Answer
The phrase "populist surge" succinctly encapsulates the essence of comedian-turned-politician Beppe Grillo's career in Italian politics. Grillo rode a wave of discontent fueled by public disillusionment with traditional parties and institutions, tapping into a reservoir of anti-establishment sentiment and a yearning for change. The term accurately characterizes the sudden emergence and significant impact of populist, eurosceptic, and anti-immigration movements across Europe.