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You are crushing hard on someone when another person informs you of something bad about your crush.
Amber: Wow! That British boy, Oliver, is sooooooo cute! I'd like to get at him!
Jessy: You do know it's not custom for British boys to be circumsized, right?
Amber: Oh...well that's a lust kill...
by LoveThoseBritishBoys October 23, 2010
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