Blac Chyna Bad Ass Pitch Woman For Rob's Sox

2/11/2016 6:19 AM PST BY TMZ STAFF

0210-blac-chyna-socks-instagram-01Blac Chyna should not be Rob Kardashian's first pick to pitch his sock line ... because the distractions are overwhelming.

Chyna posted this pic, wearing little else butt a pair of Rob's Arthur George socks.

Meanwhile, back at the ranch, Amber Rose posted a video with the caption,"Drunk af #trinidadcarnival."

They're still in Trindad ... they like to party.