A modification to the height of the handlebars on chopper-style motorcycles, raising the grips so far up above the seated rider that they appear to be "hanging" as they hold onto them; this causes the appearance of riders seeming similar to primates as they ride.

when you're hungover as shit after a spending a night drunk as a skunk

man boobs that sag with great severity, also having the ability to use aforementioned man boobs as leverage.

When a woman has giant hairy pussy lips

Ape Hangers are handlebars on a motorcycle that look extremely high. Way back when you would usually see black people on them dead which coined the term Ape Hanger.