When doing a chick doggy-style, just before you blow your load, spit onto her back. When she turns around to see your handiwork, pull out your cock and shoot it in her face while yelling "HOCUS POCUS" as loud as you can.
I gave your mom a hocus pocus last night and boy wuz she surprised.
Hocus Pocus was walking around a castle, and blasted a flying devil. While jumping around collecting gems, a mushroom ran into him, and he took damage. Hocus collected a white potion, and blasted the mushroom with rapid-fire.
As implicated by the Chronic Album in The 20 Dollar Sac Pyramid, it is an alternative term for Marijuana, just as is Buddha or N-Do. Nonetheless, it can be used as an expression for Marijuana of compromised quality, hence havingmagic-like effects.
Damn E, dat hocuspocus got me trippin like a Mo Fo.