Cat Snatch (3.5e Feat)
From D&D Wiki
Cat Snatch [Racial]
You may start a grapple as a free action with bite attack.
Prerequisite: Bite attack, Feline Race
Benefit: You gain the improved grab special ability. To use this ability, you must hit with your bite attack. You can then attempt to start a grapple as a free action without provoking an attack of opportunity. If you win the grapple check, you establish a hold.