What does Antony mean when he tells the conspirators, "My credit now stands on slippery ground"? (3.1.204)
Antony is admitting that his reputation is something that always preceded him positively; however, now that Caesar is dead, he is worried that no one is going to see him in the same light that Caesar did.
Antony is concerned that the citizens of Rome will not want him as their ruler because Caesar is not there to boost him up.
Antony realizes that the citizens of Rome may think he was part of the conspiracy if he continues to act in a friendly manner with Brutus and Cassius.
Antony is most fearful of how the conspirators will perceive him if he treats them with flattery and respect; they may question his hidden agenda.