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Wiktionary
jb

n. (initialism of jailbait English)

Wikipedia
JB

JB or J.B. may refer to:

JB (disambiguation)
JB (Swedish musician)

Janne "JB" Christoffersson is a Swedish singer and guitarist. He was the singer for the stoner metal band Spiritual Beggars and plays guitar and sings for the heavy metal band Grand Magus. On 20 August 2013 he was confirmed to be featured in the new Ayreon album, The Theory of Everything.

Usage examples of "jb".

SHe had the feeling that carelessness here would get Jbim more trouble than a chewing out by the captain.