The Corrupt Bargain was a deal between two presidential candidates in the Election of 1824.
Ballot Box 1824
Henry Clay was a presidential candidate in the Election of 1824, running for the Democratic-republican. His home state, Kentucky, supported him rather than national party. Henry clay won 37 electoral votes and won 47,531 (13.1%) of popular votes.
I want nothing more than to be president.
John Quincy Adams was another Democratic-Republican candidate. His home state, Massachusetts, was rooting for him as well. Adams won 84 electoral votes and 113,122 (30.5%) of popular votes.
Andrew Jackson was the final Democratic-Republican candidate, other than William Harris Crawford, for president. Jackson, from Tennesse, won 99 electoral votes and 151,271 (43.1%) of popular votes.
Look at me. I won!
The election of 1824 was too close to call and there wasn't a clear winner according to the Constitution. John Q. Adams and Henry Clay made a deal; Clay would use his influence as Speaker of House to defeat Jackson. In turn, Clay would become secretary of state (and most of the time Sec. of State's became President later). With Clay's help, Adams won the election.
However, many of Jackson's followers accused Clay and Adams of making a 'corrupt bargain", which cast an shadow of unwanted attention of Adam's presidency and Jackson comes back with a vengeance to win the election of 1828.