Be dead from the waist down phrase
If someone "is dead from the waist down", he/she is incapable of having sexual arousal.
If you turn that hot girl down, it means that you are dead from the waist down.
He has been dead from the waist down since he broke up with his girlfriend.
The verb "be" should be conjugated according to its tense.
The key element of funny speech and writing is shortness.
A successful comedian is a person who knows brevity is the soul of wit.