An idiom both eloquent and evocative.

hmm...

You don’t have to wait long for someone to say, “Ew, gross!” when something is, well, gross.

That phrase is pedestrian in the extreme. You get the message, but there isn’t anything original or evocative about it.

The next time you see something, gross, try saying,

Vulture
 
“That’s gross enough to puke a buzzard off a gut wagon.”

It’s both eloquent and evocative, and your friends will appreciate your eloquence, if not the mental image you just evoked in their brains.