Meanings of fast fellows in English

He cannot dine comfortably without half a dozen fast fellows about him.

These fast fellows frightened Amedee a little, as he had the misfortune to be fastidious.

The fast fellows are divided, moreover, into the occasional and permanently fast; and first of the occasional fast fellows:-

We should be doing great injustice to the fast fellows if we omitted a brief notice of their accomplishments.

We have now done with the fast fellows, and shall like them the more the less we hear of them.

Driving is, of course, the chief; and, by long experience and impunity, wonderfully grand exploits are achieved by the fast fellows in this department.