Acronym for "Alien I'd Like to Fuck".
A crucial staple of Science
Fiction, rendering it watchable.
Pronounced "alf", but not to be
confused with the puppet from the 1980s TV
show, who is not an example of an AILF.
Examples of an "AILF":
The
chick Steve Guttenberg does (in an alien sort of way) in "Cocoon".
Natasha Henstridge is "Species".
"Orion slave girl" (the green
chick) in "Star Trek".