This is best used after you've worked your ass off in the hot sun all day. When banging a girl in the missionary style, you strategically position your armpit over her face. Thus, the aroma of your hot, salty, smelly manliness engulfs your lady's face and creates the experience of the "dirty missionary".
Amanda: I love you watching you work in the yard all day -Can I get you anything?

Jay: How about some hot sex right now?

Amanda: I think we can do that

While going at it - Jay sticks his left armpit into Amanda's face

Amanda: Oh that's gross!

Jay: It's not gross - it's the Dirty Missionary!
by richardstarkey February 25, 2013
Get the Dirty Missionary mug.