binos, n. — Green’s Dictionary of Slang

binos n.

also b-nos

[abbr.]

(US) binoculars.

2001		G. Pelecanos Right As Rain 229: Five-hundred millimeter lens, it’s like having a nice set of binos.
2012		C. Eble (ed.) UNC-CH Campus Sl. 2011 1: B-NOS — <binoculars.
2012		(con. 1980s) I. Welsh Skagboys 365: Then you can see this copper appear [...] Ah wish ah had binios.