In the 14th and 15th centuries, the so-called "Lollards" - a pejorative meaning something like "traveling mutterers" - traveled about England preaching that human nature is not sinful but perfect, and that because the world is still the Garden of Eden (i.e. it's not "fallen"), no one should work. The Calvinists decided that this all too attractive religious heresy was a sin... which is why to loll and to lollygag have come to mean "act or move in a lax, lazy manner." Really, they should be considered synonyms for "idleness." See: IDLENESS, LOLL, SLOTHFUL.

be about; "The high school students like to loiter in the Central Square"; "Who is this man that is hanging around the department?"