Has its origins from the "Kung Fu" television series from the 1970s, starring David Carradine as the Shaolin priest Kwai Chang Caine. As a young student at the Shaolin temple, Caine, in his youthful ignorance, takes pity on a blind Shaolin master, believing the master's blindness to be a terrible affliction. The master quickly corrects Caine, illustrating that despite his blindness, his awareness of the world is much higher than Caine's -- for example, the master takes notice of the grasshopper at Caine's feet whereas Caine does not.
From that moment on, the blind master befriends Caine and becomes a mentor to him. He gives Caine the nickname of "Grasshopper" in an affectionate reference to this first encounter.
Person 2: Ah, watch and learn, Grasshopper ...
This word is similar to padwan.
Man 2: "3 days? WTF, I downloaded it in 34 minutes"
Man 3: "Not everyone has broadband, grasshopper."