Rapper Wiz Khalifa has reportedly compiled a long list of complaints against his estranged wife Amber Rose, including that she neglects their son.

Khalifa wants the custody of their one-year-old son, Sebastian, because he believes Rose `is a bad mom,` according to documents obtained by tmz.com.

The 27-year-old claims Rose, 31, often stays out all night and gets relatives and staff to babysit Sebastian. Khalifa also says she lets the family dog lick their son's face after eating its own faeces.

He also claims that Rose only plays for 15 minutes with their son when she wakes up in the morning before disappearing, and that Sebastian is said to be upset with Rose and her mother because they often had `shouting matches and vulgar exchanges`.

However, Khalifa has not filed legal documents yet. He is currently trying to get support from relatives and other involved to make his case stronger.