Something enjoyable or beneficial which, nevertheless, becomes bothersome or harmful in large quantities or over an extended period of time.

(simile, humorous) Useless; pointless.

(humorous) thank you very much

(simile, informal) Thoroughly useless.

(idiomatic) A lot of fuss about something trivial.

One may have too much of a good thing.

One can have too much of a good thing.

(dated) without permission.

(UK) It is suspected that, because someone is insisting too much about something, the opposite of what he or she is saying must be true; a hit dog will holler.

(rare) Pronunciation spelling of thank you so very much.