The oldest band out there with "Youth" in the title. But they own my ass, your ass, and all ass everywhere at any time.
"Sonic Youth has provided the soundtrack to my life and they do still be still rockin it live from 9 t 5 with RATHER RIPPED. Hell yeah-uh!"
When the time has arrived to undertake a task (often unseemly, difficult, or requiring courage), at which point there is no going back.
MacBeth screwed his courage to the sticking point and approached Duncan's sleeping form, his dagger poised for the killing blow. It was go time!
Pants that make one's ass look out of this world.
"Are those space pants? 'Cause your ass is out of this world."
Walking somewhere on your own two legs that God gave you.
(The legs each represent a "1.")
"Lazy North American mofos are so dependent on their cars they won't even take the frigging number 11 bus 2 blocks."
An obscure selection on the menu of fast-food mofos A&W. It's like a hot dog, but with more enthusiasm.
When the customer ordered a whistle dog, the clerk cringed as he fished one out of the warmer oven. Those mofos were 42 months old!
An eager person, usually with a nerdish edge to their enthusiasm.
"Hammy was already on my doorstep when I got home from work, even tho the show's not 'til 9. Brah's a keen bean."
"Jennifer's such a keen bean she ducked out of the New Year's party early to get a head start on her tax return."
A rear end that is flat or non-existent, or, in extreme cases, even oddly concave.
"My jeans flap in the back 'cause I got a negative ass."