Add this unofficial Urban Dictionary bot to your Slack! (note: probably nsfw)
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<a href="https://slack.com/oauth/authorize?scope=commands&client_id=7872350391.16790366753"><img alt="Add to Slack" height="40" width="139" src="https://platform.slack-edge.com/img/add_to_slack.png" srcset="https://platform.slack-edge.com/img/add_to_slack.png 1x, https://platform.slack-edge.com/img/add_to_slack@2x.png 2x"></a>