Running directly into someone, both parties crossarms while charging into each other. Both parties collide, only one sustaining injury whilst the other party doesn’t. The party that loses the duel would have been boshed.
To get extremely drunk / high
Most commonly referred to as a term for taking pills or mdma.
Wayne: Yeah bruv got some pills off jose manuel last night innit
Jeremy: Oh marvellous my good friend, how was that for you?
Wayne: Yeah bra, got turbo boshed innit
Getting screwed by someone or told that you are wrong, even though you are completely right.
You were bosched in that meeting today. Everything you said was true, but the Germans were too stubborn to listen to reason. They denied everything, including the truth.