Knowingly and willfully pursuing a high-risk course of action with reckless disregard for potential consequences.
Example 1:
Kilian: I just got my unemployment check, should I just invest it in Enron options?
Andy: Send it bro!
Example 2:
Blake: I want to leave a poop bag on Ms. Stendig's porch
Leigh: Hell yeah dude, SEND ITTTTTTT