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1. HTL
Hard to Learn. Used to describe someone who is hard to teach or that cannot easily understand an idea or concept.
I tried to show him how to multiply by 5 and he ain't get it. Man, you know he HTL!
2. HTL
Hit The Line - can it be a phone call or text.
Girl: "What you doing?"
Guy: "I'm at work"
Girl: "HTL when you get off"

hit line
3. HTL
Abbreviation: Hold the Line
"Go HTL or you don't get any DKP!"
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