blowback

1.反吹；回吹；逆吹a process in which gases expand or travel in a direction that is opposite to the usual one

2.违背初衷的结果the results of a political action or situation that are not what was intended or wanted

1.the reverse flow of gases in a system, e.g. through the carburettor of an internal-combustion engine during the compression cycle

2.the powdery residue that is released or ejected upon firing bullets or shells from a weapon

3.a reaction or effect resulting from an action or cause, usually a negative reaction