(computing) A hacking session extended long outside normal working times, especially one longer than 12 hours; sometimes an all-nighter.

A brief trip across a visited country's border in order to "restart the clock" on one's visa upon returning, where it would otherwise have expired.

(idiomatic) To act in an uncontrolled, unbridled manner. / (idiomatic) To be uncontrollable.

plural of ski run

(idiomatic) To undergo a series of tests or challenges.

(transitive with to) To defy or oppose something, especially an expectation, custom, or social standard.

(idiomatic) To behave recklessly. / (idiomatic) To take a calculated risk. / Used other than figuratively or idiomatically: see run, scissors.

plural of run-on sentence

plural of mole run

plural of run chase