A multi-generational turn of phrase; commonly used to describe an object, person, place, or situation that is markedly better than being described solely as "dope."
"Dope" has been used in slang for many decades and has become one of the most popular parts of modern day dialects for many regions across all age groups. Therefore, the exclamatory "dope on a rope" continues to embolden all who embrace the phrase by providing a truly specific and unique descriptor for the most exciting, thrilling, and delightful of humanity's most historic moments.
See also:
Too dope to cope
Hope to cope with dopeness of taupe rope
Example 1
Person A: Yo, I got some free banana bread at work today dude Person B: Dude, that's dope on a rope!
Example 2
Person A: Hey, check out this setup I created for drying cannabis, the strings are made from hemp fibers
Person B: holy shit that's dope on a rope!!!!!
Example 3:
Person A: I just made this super sick-ass bitchin' sweet tiedye shirt, how does it look on me?
Person B: YOU KNOW DAMN WELL WHAT I'M BOUT TO SAY BRO
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.