Vladimir Guerrero Jr. just did his best Bo Jackson impression ... completely -- and easily -- destroying his bat over his leg following a tough strikeout.
The Toronto superstar turned his personalized lumber into kindling in the fifth inning of the Blue Jays' game against the Yankees ... when he struck out on a Jameson Taillon cutter.
Guerrero Jr. was so mad at himself for waving at a pitch that ended up outside of the zone -- he slammed his bat to the ground .