Hold an eel by the tail idiom
To try to grab someone or something that is elusive.
He is a slippery salesman, so it is difficult to hold an eel by the tail.
The plan seems hard to hold an eel by the tail to keep up with the progress of project.
Stock market is hard to hold an eel by the tail in the COVID-19 pandemic.
Deceitful, calculating, and unreliable; elusive.
The verb "hold" should be conjugated according to its tense.
Someone only loves their sexual partner who has a large penis.
Are you large enough for her? You know, she is a size queen.