Definition from Wiktionary, the free dictionary
Alternative forms 
Shortened from gonads.
- Rhymes: -ædz
nads (plural only)
- (slang, rarely used in the singular) The testicles.
- Ooh! Right in the nads. That’s gotta hurt!
- (slang) Courage; strength of will.
- Do you really have the ’nads to go through with this?