Mac (It's Always Sunny in Philadelphia)  Ronald "Mac" McDonald is a fictional character on the FX series "It's Always Sunny in Philadelphia". Mac is Charlie Kelly's childhood friend and Dennis Reynolds's high school friend and later roommate. Mac is a co-owner of Paddy's, the self-proclaimed "Sheriff of Paddy's," and is generally the pub's most active manager. Mac is played by Rob McElhenney. Mac frequently uses his signature line, "What's up, bitches?" throughout the series. In many episodes, Mac will enter the bar announcing "I've got news" or a variation of the phrase, to set the episode's plot in motion. The others rarely share his enthusiasm, but he usually convinces one of them to follow him, though often reluctantly. Throughout the series, Mac uses a "puppy-dog look" when he is ashamed or when he proposes something reprehensibly shameful. For the first six seasons, Mac's full name was kept anonymous as a running joke, though in the season four episode "Mac & Charlie Die," Mac's father's name is listed as "Luther Mac" on his parole papers and his mother is referred to as Mrs. Mac. In the episode "Who Got Dee Pregnant?," one of the McPoyle brothers refers to Mac as "Macwell." In the episode "The Gang Cracks the Liberty Bell" Mac, or at least Mac's 18th Century counterpart, is called "McDonald," suggesting that this is his surname. Mac's full real name, Ronald McDonald, is revealed in the season seven episode "The High School Reunion". Mac hates the name due to its connection with the spokesman of the popular fast food chain McDonald's as well as his old nickname, "Ronnie the Rat," which he obtained from ratting on fellow drug dealers in high school. Mac "ratted" on drug dealers so he could become the main drug dealer of the school. He prefers to be simply called "Mac". Mac comes from a broken home; his father has been incarcerated for dealing meth and his mother is extremely apathetic and unemotional. Mac and his mother also own a dog named Poppins, who despite being extremely old and prone to eating poisonous objects appears to be practically indestructible. He sees himself as a karate expert and total "badass". Mac constantly seeks the acceptance of others, especially his parents, but his over-earnest efforts do not endear him to others.