Top definition
adjective : describing someone so oddly attractive to you, you are unable to delete them from your Facebook no matter how offensive or boring they may be, you find them irresistible
or they are just so awesome you can not imagine your Facebook life without them, either way they are undeleteable!
That girl is so annoying yet ,I find her undeleteable. Its like I have to know what stupid thing she will say next!
by Dawnels June 27, 2010
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