A "thing" which wraps it's legs around your neck, and shoves it's penis in your mouth and lays it's eggs. It uses a special mechanism called: Eggjaculation
The facehugger is a parasitoid; its only purpose is to make contact with the host. Facehuggers are often 20-something nerds that have only recently left their mother's basement (if ever). Upon making contact, the facehuger suffocates the life out of a conversation and forces its ideas upon the unsuspecting host. Attempts to remove facehuggers generally prove fatal, as the parasitewill respond by tightening its grip.
Lookout, here comes Bob, he's a real facehugger. Once he getsgoing, we'll never get away.
Infiltrating someone's electronic communication account, such as email or facebook, and sending out erroneous and usually embarrassing content for saiduser
After my sister left her laptop on and her Facebook account up, I facepunked her status to imply she suffered from herpes.