This is a sexual act between four men in which one of the men strokes the scrotum of the other man. Meanwhile the man who's scrotum is being rubbed will be anally but-raped by the third man. Eventually the 4th man will receive the sperm nutrients that he needs to thrive.

The actual definition of this is the recollection of the act.
The Next Morning

Man One: Wow man! Last night was insane, wasn't it?

Man Two: What was? Back2pray?

by Pencilfield March 23, 2009
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