look at that billy bopper up there  yea he looks like a total chump with his butt sticking out and legs bouncing up and down  total billy bopper
one who has a goony batting stance at the plate
"look at that billy bopper up there  yea he looks like a total chump with his butt sticking out and legs bouncing up and down  total billy bopper" What is the definition of "billy bopper"?