The act of fucking your partner with a giant dildo while it's suction cup to your forehead
Guy 1: "Why do you have a smudge on your forehead?"
Guy 2: "Me and my boyfriend did a Dirty Chas last night.

Guy 1: "Damn, you guys are really spicing up your relationship."
by psuguy81 February 16, 2019
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Dirty Chas Dirty Chastity
An explicit sexual act starts with senior male grooming,as he peaks he busts a nutterino and she keeps slurping on the diddly.

She was so horny she gave him a Dirty Chastity
by Kristofferson1977 June 1, 2019
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