look up anything, like your first name:
1. YLF
you little fuck
YLF!

Oh, that's it, YLF!

"I made out with your girlfriend"
"YLF"
2. ylf
Short for: you lazy fuck.
Person 1 didnt show up at school.
Person 2 texts: ylf?
Person 1 answers: Yeah I was really tired this morning :P
3. ylf
Young Lady Friend
What did you get up to last night?

You know, just spent some quality time with a certain ylf.
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