It indicates to show off something, to show off an object.
In drug-addicted flexo or flexo areas is to get high on resistol bars
Spanishversioned version for slang to flex (your fleks "flex, fold" ), which is used in the trap scope by "moving well", "showing yourself, exhibiting" as best trap or as superior in general.
What a man so gross that guy upstairs that he wrote, that's what he says is "flashing."
Flexear in terms of mobile telephony, means release or unlock a phone to use it with another different company. It implies a change in chip and obtain an unlock code.