foot check 

When you squat down in a public bathroom so you can check that gap under the door for feet, to learn whether or not a certain stall is empty

I wasn't sure whether the stall was occupied, so I casually performed a foot check.

foot check by poivron October 13, 2012

Check the foot work 

Something somebody says when they 'bout to fuck you up in a video game.

Person: whoa.
Me: Check the foot work!

Check the foot work by Icicle_DBR April 19, 2017

footcheck 

defined as the initial act of scoping out your restroom-stall choices. a person causally glances down at floor level, hoping to avoid an embarrassing and unwarranted entry into an occupied latrine.

"man, why don't people lock the stalls? i did a footcheck and thought it was empty, but when i opened the stall, i saw some guy in mid-wipe."

footcheck by oopspoops August 8, 2007