Falling asleep at the wheel 

When a hamster finds themselves really tuckered out, after all that cardio. And doesn't want to move from the wheel before taking a nap.

Man. Moo Moo sure has been falling asleep at the wheel a lot lately. I wonder how much he'd hate me if I poked his little belly right now.

Falling asleep at the wheel by Olive989 March 3, 2023

Falling Asleep at the Wheel 

When you fall asleep while jerking off

Bro Joeys mom walked into his room and caught him falling asleep at the wheel!

Falling Asleep at the Wheel by Not An Actual Gamer January 10, 2020

Falling Asleep at the Wheel 

When someone is obviously tired and/or dozing off, but refuses to acknowledge their lack of alertness.

Bob: Joe Anne, you look tired.
Joe Anne: No, I'm just...thinking.
Bob: Seriously, its bedtime.
Joe Anne: No, I'm awake!
Bob: Joe Anne, you're falling asleep at the wheel.

Falling Asleep at the Wheel by Breezy Cartheezy April 23, 2011

I am falling asleep

Please help its Friday and I am in the middle of a test

GUY1 'hey Guy 2 how are you"
Guy2 "I am falling asleep

I am falling asleep by Dead Rad November 27, 2020

failing asleep 

This term describes the nightly experience of those unfortunate schmucks who just absolutely cannot fucking fall asleep, no matter how much thrashing around in bed they do or how much ruminating over past mistakes they indulge in. Instead of falling asleep, an insomniac is simply failing asleep.

Alice: "Wow, you look like hell"
Bob: "<mumble> last night I was failing asleep and couldn't stop thinking about some shit from middle school when I got my bike stolen"

failing asleep by channel_panel June 16, 2018