:
{                    (json object)
  "txid" : "hex",    (string) The id of the new transaction.
  "origfee" : n,     (numeric) The fee of the replaced transaction.
  "fee" : n,         (numeric) The fee of the new transaction.
  "errors" : [       (json array) Errors encountered during processing (may be empty).
    "str",           (string)
    ...
  ]
}

Examples:

Bump the fee, get the new transaction's txid
> bitcoin-cli bumpfee <txid>


