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Covered Blow Job

also known as CBJ

Fellatio with a condom.

More information

This is another one of the terms which is used almost exclusively in the universe of sex workers and those who pay for sex.  It is considered a bonus for a sex worker to not use a condom during fellatio.  

The Erotic Review

The Erotic Review, http://www.theeroticreview.com/, a site where sex workers are reviewed, gives points to women.  Providers can only get a higher score if they engage in an uncovered fellatio, allow someone to come in their mouth, or allow for anal.