1. [late 17C–early 18C] (UK gambling) to use sleight-of-hand to cheat in dice-play.
2. [mid-18C] (UK Und.) to swear, to take an oath.
3. [mid-18C] to arrest.
4. [late 18C–19C] (UK Und.) to steal, to take, to receive; thus knapper n., a thief; knap a clout, to steal a handkerchief; knap seven penn’orth, to receive a 7-year sentence; knap/nap the glim, glue, to catch venereal disease; knap the swag, to grab the plunder.
[early 19C] (UK Und.) to steal the ladder from a nightsoil cart in order to use it for burglaries.
see nap a winder under nap v.1
see nap it under nap v.1
[early–mid-19C] (UK Und.) to take or steal what has already been stolen.
[19C] to lose one’s temper.
[late 18C–mid-19C] to be placed in the pillory.