What does Judges 9:38 mean?

Then Zebul said, 'Where’s all that talk now? You said, “Who’s Abimelech that we should serve him?” Well, here’s the army you were mocking. Go out and fight them.' Judges 9:38 - Modern Text Bible

(Zebul calls out Gaal’s earlier bravado, challenging him to back up his words with action now that the threat is real.)