HSM stands for high school musical the Disney original movie starring Zach efron
Hsm is my favorite Disney movie
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Heat Seeking Missile - originally defined as a weapon of war but also used to describe someone (a male) with a high sex drive who is always chasing poonani and keeps up the persistance despite getting repeated knockbacks
As in : "Jimbo is an hsm" or "Jimbo was always despatching the hsm" or "Jimbo has an hsm"
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An acronym for 'Hot Steamy Man Sex', often used to subtly express yearning for male cock in front of the girls.
Yo john do u wanna head out the back for some HSMS *winky face*.