All 8 Uses of

carp
in
Middlemarch

Uses with a meaning too common or too rare to warrant foucs:

He suspected the Archdeacon of not having read them; he was in painful doubt as to what was really thought of them by the leading minds of Brasenose, and bitterly convinced that his old acquaintance Carp had been the writer of that depreciatory recension which was kept locked in a small drawer of Mr. Casaubon's desk, and also in a dark closet of his verbal memory.†
Chpt 3

And from the first there was to be a Latin dedication about which everything was uncertain except that it was not to be addressed to Carp: it was a poisonous regret to Mr. Casaubon that he had once addressed a dedication to Carp in which he had numbered that member of the animal kingdom among the viros nullo aevo perituros, a mistake which would infallibly lay the dedicator open to ridicule in the next age, and might even be chuckled over by Pike and Tench in the present.†
Chpt 3

And from the first there was to be a Latin dedication about which everything was uncertain except that it was not to be addressed to Carp: it was a poisonous regret to Mr. Casaubon that he had once addressed a dedication to Carp in which he had numbered that member of the animal kingdom among the viros nullo aevo perituros, a mistake which would infallibly lay the dedicator open to ridicule in the next age, and might even be chuckled over by Pike and Tench in the present.†
Chpt 3

It would be as bad as letting Carp, and Brasenose generally, know how backward he was in organizing the matter for his "Key to all Mythologies."†
Chpt 4

That prospect was made the sweeter by a flavor of vengeance against the hasty sneers of Carp & Company; for even when Mr. Casaubon was carrying his taper among the tombs of the past, those modern figures came athwart the dim light, and interrupted his diligent exploration.†
Chpt 4

To convince Carp of his mistake, so that he would have to eat his own words with a good deal of indigestion, would be an agreeable accident of triumphant authorship, which the prospect of living to future ages on earth and to all eternity in heaven could not exclude from contemplation.†
Chpt 4

Besides, he knew little of Dorothea's sensations, and had not reflected that on such an occasion as the present they were comparable in strength to his own sensibilities about Carp's criticisms.†
Chpt 4

Nay, power is relative; you cannot fright The coming pest with border fortresses, Or catch your carp with subtle argument.†
Chpt 7 *

Definitions:

(1) (carp as in: carped incessantly)
to repeatedly complain -- typically about unimportant things
(2) (meaning too common or rare to warrant focus)
meaning too common or too rare to warrant focus:

More commonly, carp is used as a noun to describe a common freshwater fish.