Text:

Not my first rodeo

Context:

The informant frequently says this when he is able to guess the outcome of a certain situation or story without being told. He heard this phrase in 2014 from the owner of a music shop that he frequented. It was used to convey that he had adequate experience in the field and had encountered stuff before.

Analysis:

 This idiom comes from the 1981 film “Mommie Dearest”, although the phrase is understood by most Americans who are adults. Rodeos are a part of American culture where individuals would compete in equestrian sports. It is used to convey that someone has had adequate experience, is competent, and not naive. People may use it when talking about participating in certain activities or predicting certain outcomes. v