When someone with the influenza virus inserts his penis into a healthy recipient's mouth and holds it there for at least five seconds. It is only considered a Reverse Flu Shot if the recipient gets the flu within 48 hours.
Spencer: Here, put this under your tongue.
Cindy: What is it?
Spencer: My dick. I'm giving you a reverse flu shot.
Cindy: Oh, haha. Cool.
The act of ejaculating so hard at the back of a woman's throat that semen comes out of her nostrils. She then has the option to blow the semen out or sniff it back into her mouth, at her preference. This is the reversed version of the regular snot shot, where a man ejaculates directly into a woman's nostril.
"Hey Jean Claude, how was your date last night?"
"Dude, you won't believe this, she blow me so hard I gave her a reversed snot shot!"
"Wicked, Jean Claude."
Muligan and Lafayette: We? Fought with him
John Laurnes: Me? I died for him.
George Washington: Me? I trusted him.
Angelica Schuyler, Eliza Hamilton, and Maria Reynolds: Me? I loved him.
Aaron Burrow: And me? I'm the damn fool that shot him.