Osoto Gari or, major outer reaping throw, is usually the first technique taught to beginner judo players, and thus people tend to believe its a 'beginners throw.' Many greats including Kimura, Yamashita, Geesink and Yoshida all had very devastating Osoto garis that won very large international tournaments.
Osoto gari in action
(look out for the first throw which was performed by kimura on Helio Gracie)
My instructional (mind the unkempt gi)
A combination when the osoto gari is blocked by your opponent