Yup

[Jessica]

Yup is a generic term of agreement issued often by a non-listening party, typically used while performing an additional important task, such as watching tv.
If you are the yupper, by yupping someone, you are not bound in any sense by your agreement, since you didnt hear what it was you were agreeing to. If you are later asked to perform the task, you then have the option to admit that you had yupped the person and ignore the task, or pretend that you had really listened

[Rihanna]

Synonym for yes, yeah, etc.

[Jessica]

The noise a small dog makes when inhaling large amounts of smoke.
It can also be the sound a dog makes trying to yip while its lungs are busting into flames.

[Justin Bieber]

When your mad at babe and want him/her to notice, just say YUP.