racker1
/ˈrakə/noun
1A person who racks wine or other liquor.
2An apparatus for filling beer barrels.
Origin
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From rack + -er.
racker2
/ˈrakə/noun
A horse which moves with a racking gait.
Origin
Late 17th century. From either rack or rack + -er.