cause (a plastic object) to assume a crooked or angular form; bend, deform, twist, turn
bend the rod
twist the dough into a braid
the strong man could turn an iron bar
English Slang Dictionary
1. scratching, from flexing of the wrist. Rakim used to talk about Eric B being on the flex 2. to show one's mettle, flexing one's muscles, showing one's arsenal and readiness to put it to use, letting one's pugilistic prowess be known. To strike someone, or to get up in someones face for intimidation:"I use my nine when suckas start to flex" -- Ice Cube (Man's best friend [1991]) 3. to have sexual intercourse
Investopedia Financial Terms
Flexible Exchange Option (FLEX)
An option, generally written by a clearing house, whose expiration date, strike price, and exercising style can be modified.
Investopedia Says:
A flex option provides flexibility as it can be tailored to meet an investor's specific needs.