Like stink (on a monkey/skunk/pig/etc.) informal simile
Being very strongly
When the mass shooting occurred in school, every news outlet in the nation was on it like stink on a monkey.
The fans chased the car carrying the Portugal football star, Ronaldo, like stink on a pig.
To happen strongly or successfully.
Extremely ugly; unlovely; unattractive
I hate frogs because they’re as ugly as sin.