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Short for, "Autistic Techie I'd Like To Fuck".

The term originated in San Francisco, due to the density of highly attractive but completely socially inept tech workers.
Bill: Wow Kate is a total ATILF. I'd definitely tap that.
Rick: Good luck having a conversation with her bro, she only speaks Python.

Tom: Thinks to himself, "Damn, Nancy is such an ATILF, I have to invite her over for dinner and Netflix."
Tom: Hey Nancy, want to come over this Friday for dinner?
Nancy: I only eat Sriracha and toast when I'm not coding, plus Google told me my cat has fungal meningitis so this weekend is not good for me.

Becky: Hey Jeff, want to come get lunch with the other team members and me?
Jeff: No Becky. I don't. I only eat Soylent.

Trisha: Mark would be a total ATILF if he showered more than once a week and his one hoodie didn't smell like pot.
ATILF by SLAR NAR April 9, 2017
Related Words
look at that ailf over their
ailf by brandon schwartz April 10, 2006
Oh my gosh, I was watching E.T last night, he's so hot, what an AILF!!!
Ailf by AILF LOVER! September 29, 2010
The best person you can ever meat in your entire life he is kind smart funny and very cool
acil by Ziz w77 November 20, 2021
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".
AILF by beckynot August 26, 2013
Hey Karl, check out the long proboscis on that insect lovin' mammal. A prime example of an AILF!
AILF by Roger McTodger November 15, 2004