- put the boot in
- to disrupt or upset through offensive behaviour or the threat of violenceLiterally, what a ruffian may do when he has knocked you down. Figuratively of any harmful or dishonest action:Leseter's success with the horses was achieved by 'putting in the boot' — fixing the races. (Evans-Pritchard, 1997)or of deliberately making a hurtful remark:Mrs Lupey says living successfully in a family is largely a matter of timing, and, I must say, I picked exactly the right moment to put the boot in. (Fine, 1989)
How not to say what you mean: A dictionary of euphemisms. R. W. Holder. 2014.