It's a noun, which is used to identify that of any small dog, or puppy. It can also be a verb, which is the sounds they make as well.
Yip-Yip: *Bark!!! Ararargh!!! Bark!!!*
Manny: Damn, I'm sick of all these damn yip-yips makin' all that noise! It just keeps yippin' and yippin' as I'm doing work. My neighbor need to control them yips!
Manny: Damn, I'm sick of all these damn yip-yips makin' all that noise! It just keeps yippin' and yippin' as I'm doing work. My neighbor need to control them yips!
by Mr. Ice Cream Man March 01, 2015