swear down

swear down

1. An exclamation of one's truthfulness. Primarily heard in UK. It was Tommy who bungled up the report, not me. Swear down!
2. To swear to someone that what one has said is true. In this usage, a noun or pronoun can be used between "swear" and "down." Primarily heard in UK. She swore me down that she didn't take the money.
See also: down, swear
Farlex Dictionary of Idioms.
See also:
  • swear
  • swear (that) black is white
  • swear black is white
  • I am so sure!
  • I'm so sure
  • if it's the last thing I do
  • bullyrag
  • honest
  • honest!
  • clean hands, have