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general::
Phrase(s): (There ain’t) nothin’ to it.
Rur. It is easy. • Mary: How do you keep your car so shiny? Tom: There ain’t nothin’ to it. I just wax it once a week. • It took Jane just two minutes to sew up the hole in my shirt. "See?" she said. "Nothin’ to it!"
McGrawhill's American Idioms And Phrasal Verbs