train lint

People who enter a train and get stuck at the door forcing everyone else to have to squeeze past them even though there's ample space further inside the compartment. Sort of like lint in the dryer.

See also, train lint catcher - a person who yells at train lint to move further in and stop blocking the door.

Man there was so much train lint on the 9:02 this morning, I feel like I've been in a mosh-pit. We could've really used a train lint catcher.

herd physicality

The corporeal equivalent of 'herd mentality'. The way in groups of people physically behave and copy the actions of others in the same way that herd mentality suggests a group of people who follow a consensus without thinking for themselves.

The herd physicality at sporting events, political rallies and religious gatherings makes them strong prospects for super-spreader events.