In English, "闲逛" is typically translated as "to stroll" or "to take a leisurely walk." This phrase comes from the verb "逛," which means "to walk around leisurely or aimlessly." Some example sentences in English and their translations in Chinese are:

I like to stroll around the park on weekends. (我喜欢周末在公园闲逛。)

Let's go for a leisurely walk and take in the sights. (让我们去闲逛一下，欣赏风景。)

I spent the afternoon strolling around the city. (我整个下午都在城市闲逛。)