What does it mean to be tiresomely talkative?

Being tiresomely talkative refers to someone who speaks excessively or at length, often to the point of being annoying or tedious to others. The term that encapsulates this characteristic is "garrulous." A garrulous person tends to engage in long-winded conversations, frequently sharing unnecessary details that can frustrate their listeners.

The other terms do not carry this same connotation. "Grandstand" refers to someone showing off or seeking attention, typically in a public setting. "Hallow" means to honor as holy or sacred, which is unrelated to the concept of excessive talkativeness. "Gibe" is to make mocking or insulting remarks, which does not connect with the idea of being talkative in a tiresome way. Therefore, "garrulous" precisely captures the essence of being tiresomely talkative.