What is god forbid?

"God forbid" is a common English expression used to convey the hope or wish that something undesirable or unfortunate does not happen. It is often used to express concern about a potential negative outcome. The phrase carries a sense of invoking divine intervention to prevent the occurrence of the undesirable event.

In usage, it might appear in sentences like, "God forbid there should be an accident," indicating the speaker's strong desire that an accident does not occur.

The phrase can also be utilized in a rhetorical manner, sometimes humorously or sarcastically, to emphasize the speaker's desire to avoid a particular situation. It's a part of everyday speech and can be found in various contexts across conversations, literature, and media.