Whilst walking, one swings the arms in an
aggressive & sometimes uncontrollable manner perpendicular to the body, in an attempt to gather momentum & propel the body forward thus compensating for an inability to move efficiently.
This characteristic is often exhibited by more rotund individuals, to overcome the high level of inertia whilst initiating movement.
“Watch out!” exclaimed Simon, “You were almost knocked the f*ck out by that pendularm!”
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"