The subjective (but reliable!) measure of the aural quality of a female orgasm, taking into account pitch, tone, duration, intensity and content (ie what she actually says - some women scream "yes!", for instance, whilst others make noises resembling various animals).
A: How about Stephanie - you reckon she'd have a decent climax call?
B: Yeah, she'd have a wild one - better than Zoe's climax call, she's too whiny.
A: I like whiny.
B: Whiny is bad, dude.