Does any one know what this mean?

The orignial text is this:

"At other times he would take a little wine; pull himself together; attempt to chaff Nancy about a stake and binder hedge that her mare had checked at, or talk about the habits of the Chitralis. "

I understand the rest of the passage except for one sentence: "chaff Nancy about a stake and binder hedge that her mare had checked at"

If if helps, nn the novel the girl has a horse and rides a lot.

Any explannation is appreciated, thank you!