Send it

[Sonia]

to get drunk and party.
to give it your all, mostly through alcohol.

[Donald Trump]

US military slang for a sniper to fire a shot.

[Tina]

Rock climbing: Used to encourage a fellow climber to finish a route or problem. Similar to and interchangeable with allez! (French), or dale (Spanish)

[Becky]

1. A response to Can I ask you a question, or when someone says Let me tell you..., Listen up!, etc.
2. Response to Round(s) on the way. A military term used on a firing range, usually at the screen line, usually involving large bore weapons.

[PussyCat]

Driving at unsafe speeds. or performing reckless actions that you may have doubts about.

[Sonia]

Texas Hold Em Slang phrase: when you are confident about your hand

[Mark Zuckerberg]

Knowingly and willfully pursuing a high-risk course of action with [reckless] [disregard] for potential [consequences].

[Jessica]

To go [nuts] with [regard] to your own [safety]

[Gregory]

Meaning to do something awesome with complete and total confidence. Originates from the rock climbing/[extreme sports] community. From the term 1st [ascend], as to climb a route with no falls on the first try, [bastardized] into ascend, which was then bastardized into send it.

[Dianne]

A phrase drunk [mountain] bikers use to tell each other to hit massive [jumps] or [do something] stupid.

[Merna]

Do something that [scares] you.
[Elton] Castee from [TFIL]
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