To forage for, or (figuratively) to quickly prepare, something.
gird up one's loins
To prepare oneself for something demanding.
get one's skates on
To start doing something quickly; to stop procrastinating; to hurry up…
suck down
To drink (or, more rarely, eat) all of something quickly.
slam down
To eat or drink (something) quickly.
knock together
To assemble something quickly.
steal a glance
To look quickly at someone or something, hoping that nobody notices th…