In Guardians of the Galaxy, Vol 2,
Stakar tells Yondu that Yondu will not hear the horns of freedom when Yondu dies, and the colors of Ogord will not shine above Yondu's grave, because Yondu had trafficked in children.
We know that
the colors of Ogord refer to the House of Ogord, of which Stakar is a member.
But what are the horns of freedom?