Green’s Dictionary of Slang

boke n.1

[boko n. (1)]

(US) the nose.

[US]Matsell Vocabulum 13: boke. The nose.
[US]Trumble Sl. Dict. (1890).
[UK]Marvel XIV:344 June 3: Point yer boke ’igh in the air.
[US]Wentworth & Flexner DAS.