Literally, "bitch brat". A young girl who acts sassy and provocative towards adults in a sexually charged manner. Often qualifies for [[loli]]. The masculine equivalent is called "[[osugaki]]".

Typical attributes include [[smug]] or [[naughty_face|naughty]] expressions, a mocking [[laughing|laugh]], a single [[fang]], [[twintails]], [[short shorts]], [[miniskirt]]s/[[microskirt]]s, exposed [[midriff]], etc. May be an [[oppai loli]].

Not to be confused with erogaki ("erotic brat") who is sexually forward or seductive without being sassy, or kusogaki ("shitty brat") who is sassy without a sexual undertone.

The present meaning seems to date back to August 2018, after the announcement of [[grim_aloe|Grim Aloe]] being added to [[Bombergirl]]. For more details, see comment #2388484.
メスガキ エロガキ