A person who idly watches the labours of others while declining to offer assistance or becoming involved. Traditionally a term used by canal bargees when referring to onlookers found clustering around locks and moorings where barges have to stop and the crew engage in sometimes hard physical activity to make progress.
"Don't stuff up at Five Rise Locks or you'll get a cheer from the gongoozlers"
Disparaging term used by industry staff and others to describe persons who ride on buses for fun and as a hobby. Related terms "to crank", "cranking" and "cranked". Usually derogatory and used by some bus company staff. Known from London in the 1970s and widespread by the 1980s. Compares to the railway-enthusiast term "gricer".
"You going for a crank this weekend?"
"Yeah - I'm cranking the 56 on Sunday; it's the only route I haven't cranked."