Abhorrent means causing disgust or hatred because something violates your sense of what's right and decent. Cruel treatment of animals is abhorrent to most people. The idea of bullying someone weaker is abhorrent because it goes against basic fairness.

Notice that abhorrent describes things that offend your moral sense, not just your preferences. You might dislike Brussels sprouts, but unless vegetables somehow offend your ethics, they're not abhorrent. The word carries weight and is used for things that truly violate important principles, not just things that annoy you.