What the Hay Neigh
A common phrase used when one feels a feeling of strong bewilderment. While "What the Hay Neigh" originated from equestrian roots, it is now used far and wife outside of the field, a phrase known to all.
Person 1: I despise horses! They are some of the worst creatures known to man.
Person 2: "What the Hay Neigh"!?
Person 2: "What the Hay Neigh"!?