Verb

When used in blogging or chat, "Dated(euphemism)" is used to mock, criticize, or show dislike for a couple who are going out.

The euphemism in parenthesis is a way to give your opinion that there is/was no love in the relationship, but rather it is/was just based on sex and lust.

It is a very mean thing to write about another person, (but funny)

Can be used in present, past, or future tenses
A blog:

After John Doe broke up with Jane last week, he Dated (Euphemism) his new neighbor Jessica. Surprisingly, the relationship did not last.
by DEL83183 April 19, 2009
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