noun
A homosexual male; the male equivalent of a lesbian (the term "gay" or "homosexual" can be used to describe both males and females but "tonker" is strictly male)
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.