[chuck] vb [ME chukken, of imit. origin] (14c): cluck
[2]chuck n [perh. fr. chuck chicken] (1595)--used as a term of endearment [3]chuck vt [origin unknown] (1583) 1: pat, tap
2. a: toss b: discard "~ed his old shirt" c: dismiss, oust--used esp. with out "was ~ed out of office"
3: to have done with "~ed his job" "~ it all and retire" [4]chuck n (1611) 1: a pat or nudge under the chin
2: an abrupt movement or toss [5]chuck n [E dial. chuck lump] (1723) 1: a cut of beef that includes most of the neck, the parts about the shoulder blade, and those about the first three ribs--see beef illustration
2. chiefly West: food
3: an attachment for holding a workpiece or tool in a machine (as a drill or lathe)