The act of aiding one's chances of getting
laid,
pussy,
vag, bj, boobies, hj, 1st, 2nd, 3rd, and/or 4th base; can be done through performing self-reputable acts or boasting on someone else.
So dude, that 46 second kegstand totally cockboosted you with Kierstin.
Thank you for leaving the dorm last
night,
homie, that was a total cockboost with Morgan Adams.