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Doing something unsolicited and extremely unwelcome to another. Additionally, wise advice that every heterosexual male in a committed relationship should heed. Also abbreviated as dsydimb.

This phrase arises from the bewildering and hostility-invoking belief that a girl will get turned on and want to have sex if her partner sticks his erect dick in her back while she is trying to sleep. For unknown reasons, all heterosexual males engage in this behavior with their significant other and seem not to notice or ever learn that foreplay or some other less aggravating tactic would actually be far more effective.
YourMom: Hey, I signed you up as a counselor at Carol's kid's churchcamp this summer.
Lil Lis: Don't stick your dick in my back, man.

Next example:
Guy: Wake up Jane, I want to have sex.
Gal: Don't stick your dick in my back. Now I just want to kill you.
by thundersnow December 10, 2010
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