mislippen

mis- +‎ lippen

mislippen (third-person singular simple present mislippens, present participle mislippening, simple past and past participle mislippened)

1. (transitive, Britain dialectal, Northern England, Scotland) To neglect.
2. (transitive, Britain dialectal, Northern England, Scotland) To suspect; to be suspicious of.
   • Sir Walter Scott

     I thought it best to slip out quietly though, in case she should mislippen something of what we're gaun to do […]

• pimpinels