Draco caught sight of Harry, Ron, Hermione and Ginny staring at him, nodded curtly and shouted "what yo' mudblood asses doin' starin' at me mugglefuckers!"
a guy who allways fucks ugly women aka munters. he thinks they're beautifull, until his mates tell him they're fugly. his taste cannot be changed, how hard you may try, he'll allways end up fucking a munter.
A person of less expertise, experience, knowledge, and understanding that causes great frustration to someone with greater knowledge, experience and expertise.