big fat slob uncle buck and play by john ( eat a lot of ) candy and visit the sane member of his family for a week in order to baby sit two cute kid ( gaby hoffman and maccauley culkin ) and a pretty but snobby teenager ( jean louisa kelly ) . the shenanigan begin when buck make breakfast and then try to sleep in a bed two size too small for his blimp of a body . mostly dull and but pepper with two or three funny scene include buck try to get a word in edge wise on the telephone with his angry girlfriend ( amy madigan ) and his meeting with a very disgust clown . candy look like he weigh 600 pound .