This word commonly translated as "here" but its applications are a little bit more nuanced. It's a little closer to "behold".

Used to express surprise, amazement, or astonishment. Comes from "Jesus", and is in some circles considered offensive, but has become quite common and inoffensive for most people.

This expression is used as an encouragement for someone to work hard, try again, get pumped up etc. It is especially used in a sports context.

A response to an outrageous statement, usually; it isn't asking for the other person to provide help or assistance (the literal translation), but stating that they can oblige by not believing or repeating what they have just said.

A common exclamation in the northern United States. The term originates from Norway and is thought to be brought to the states by Scandinavian immigrants in the 19th century. Used in cases of surprise, shock, or relief. Also commonly used as a sympathetic response to hearing slightly unfortunate news.