Top Definition
A baby xenomorph, shown in the entire Alien serious as well as Alien vs Predator 1 and 2. This is the 2nd stage in the xenomorph development after a human (or something of comparable size) is attacked by a face-hugger. After a short period of incubation it burst out of a hosts' chest like an evil bloody penis, then runs of somewhere to feed and grow at an unnaturally fast rate.
A chest-burster is the last thing the hosts sees before they die.
by Rena Snake March 04, 2008

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×