Meter ruler 

A meter ruler refers to an unusually uber-long fore finger that is pointing or being wagged at the end of an out stretched arm, giving the impression of an extremely authorotitive person.

"The jobsworth in Trago Mills wagged his meter ruler at me"

Meter ruler by Devonian Delia February 2, 2006

two meter rule 

to help prevent the spread of the coronavirus the 2 meter rule was introduced: stay at least 2 meters apart from anybody

which is now commonly accepted, almost jokingly at times, when people greet you smiling, whilst simultaneously keeping their distance

man: pass me that drink
women: well i can't because my arm is less than two meters long, so i'd be breaking the two meter rule
man: oh common just pass me it ffs

two meter rule by eskimo___ May 3, 2020