Top definition
Basically someone intensely lame, stupid, or just a party pooper. Stems from "dead", obviously. More specifically past the general insult, it's someone who totally ruins the mood.
"Man, that guy is such a deadling, he's always whining and bitching when we try to have fun!"
by TFE February 20, 2007
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The vengeful act of crapping on a lover's chest while they sleep.

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