If you buy 40 dollars worth of crack for 20 dollars and sell it for 40 dollars you just pulled a double up.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Strap on another condom

Run, Take off, Speed away. Break out.

To ready or prepare oneself

To do a threesome; menage-a-trois; 3P

To put two people on something, i.e. double team

To double something, i.e. drugs