Green’s Dictionary of Slang

1. a bone.

a.1909		press cutting in J. Ware Passing Eng. of the Victorian Era 124/1: But he swallowed a box of matches one day which burnt away all the fat and left the mere enobs you see now.
2001		J. Burkardt ‘Back Sl.’ Wordplay 🌐 enob: bone.

2. the penis.

1980

Maledicta IV:2 (Winter) 192: Single inversion is seen in backslang, e.g. enob, and to a certain extent in rhyming slang, where the elision of the rhymed word is common.