Paulina Gretzky's Boobs -- Breakaway Outside L.A. Nightclub

Good thing body checking's legal in hockey ... because Wayne Gretzky's smoking hot daughter Paulina showed off her overflowing bosom last night in L.A. ... and everyone was looking.

24-year-old Paulina's breasts made their appearance at Bootsy Bellows nightclub -- somehow strapped inside a tiny red dress.

Remind us ... what's the penalty for high-sticking?