加油 is one of my favourite idioms that means "add oil", something along the lines of "Step on the gas!" or "Pedal to the metal!" It could be used literally when driving a motor vehicle :)
My favourite is the Icelandic equivalent ("Áfram með smjörið!" -> literally "ahead with the butter!"). I wonder if the Chinese 加油 didn't originally refer to cooking oil, by the way.
Could you say: 一个分钟 here?