Michael Strahan -- Body-to-Body Contact Sports with New Girlfriend

Michael Strahan has hooked up again ... and showed off his pretty chick in St. Barts.

The athlete/commentator/talk show host/rich person was ready to flaunt his relationship while vacationing with 2 other couples -- including fellow ex-NFLer Tony Gonzalez and his wife.

It seems the stories that surfaced months ago he and Nicole Murphy might get back together ... are ancient history.

As for the lucky chick -- we're told she's not just a vacay hookup. She and Michael have been dating for a few months.

Michael -- who's co-starring in "Magic Mike XXL" -- may have retired from football, but no one told his body.