Ronda Rousey -- Pre-Fight Prophecy ... ’Let’s Get It On Instagram’

Call her Rouseydamus ... ’cause just 3 days before her fight, Ronda Rousey was telling TMZ Sports she was aiming to finish Cat Zingano in under 15 secs ... so she could fit the entire fight on Instagram. Subscribe! TMZ -- Subscribe! TMZ Sports -- Subscribe! toofab -- NEED MORE? Like us on! Facebook -- Follow us! Twitter -- Follow us! Tumblr --