The act of vultching describes somebody trying to flirt with or feel up someone else without really hiding what they are trying to do.Someone who vultches is often trying to get with a vulnerable or lonely girl who they see as easy prey.
Example 1:
James: "Kaaaassssers!!! I love you Kassseeerrrss!!!!
"When a man fucks you up the butt without a rubber. He shoots his load, and then plants his mouth on your anus and sucks out his own warm sperm, plus whatever lubricant and feces are present. That's fletching. It may or may not, include kissing you to pass the sperm and fecal matter into your mouth." -Invisible Monsters by Chuck Palahniuk