The Question and Answer section for Coriolanus is a great resource to ask questions, find answers, and discuss the novel.
Check this out:
From the text:
Third Citizen. Nay, your wit will not so soon out as another man's will; 'tis strongly wedged up in a block-head, but if it were at liberty, 'twould, sure, southward.
Coriolanus undrstands that political prostitution is a price he must pay to be on the council. The quote represents the pace of the sexuality of a whore.