Flannel is a soft woven fabric, of various fineness. Flannel was originally made from carded wool or worsted yarn, but is now often made from either wool, cotton, or synthetic fiber. Flannel is commonly used to make tartan clothing, blankets, bed sheets, and sleepwear.

What does flannel slang mean?

Collins' Dictionary of Slang says that the noun "flannel" has been used to mean "rubbish, albeit plausible rubbish" since the 1920s, and the verb "to flannel" has meant "to talk nonsense in a soothing, plausible manner, esp for the purposes of charming a woman one wishes to seduce" since the 1940s.

What is a flannel in British?

In the UK, flannel generally refers to a washcloth.