To attempt or succeeding at dominating a conversation and pushing your agenda through, against the desire of the other parties involved.
Reporter Khalisah al-Jilani had an agenda to smear Commander Shepard with loaded questions during her interview, but the Commander bull-rushed the reporter on her own show and ended the interview on their terms.
A game where you have to run from one place to another, while trying to avoid being tackled by the person who's in, because the person who's in has to try and tackle the other players before they can get past him. Once you're tackled, you're in and you too have to tackle the other players before they can get past you.
Waiting paitenly for room to move into the parking spot in a crowded mall parking lot near Christmas, some asshole did a chinease bullrush and dicked me out of my parking spot.