e/Finger locking

Information
has gloss	eng: Finger locking is the act of locking the middle joint of a finger in place, and then bending the very last joint independently from the others. It is a rare ability, and the majority of the population cannot do so.
lexicalization	eng: Finger Locking
instance of	(noun) any of the terminal members of the hand (sometimes excepting the thumb); "her fingers were long and thin" finger