straightener

noun

1. A pair of metal tongs with heated ceramic plates used for straightening hair.
2. Anyone or anything which straightens.
3. (slang)A prearranged fight to settle a dispute.
4. (slang)A bribe.

   “'Injection or not, the bloody thing won't move an inch with juice and it ain't got any. Yeah and here comes the law.' Cool as a cucumber, Ernie said, 'Leave him to me. I'll give him a straightener.'”