If they go to sleep it will be tomorrow instantly and they can't handle stepping towards tomorrow on their current level of emotional resources.

Screw "revenge bedtime procrastination" call it "tomorrow avoidance pattern."

Give me some leeway, hit the head, learning the ropes, the cat is out of the bag, get underway, the cut of your jib, true colors, hand over fist

under the weather, in the doldrums, long shot, toe the line, groggy, aloof, overhaul, mainstay, pooped, keel over, in the offing, give a wide berth, footloose, flying colors, press into service, shake a leg

SHIPSHAPE

make headway, room to swing a cat, bitter end, first rate, scuttlebutt, devil to pay, by and large, cut and run, get one's bearings, over a barrel, take a different tack, long shot, log, figurehead, under the weather, shot across the bow, batten down the hatches