Feck \Feck\, n. [Abbrev. fr. effect.] 1. Effect. [Obs.] 2. Efficacy; force; value. [Scot. & Prov. Eng.] 3. Amount; quantity. [Scot. & Prov. Eng.] He had a feck o' books wi' him. --R. L. Stevenson. {The most feck}, or {The feck}, the greater or larger part. ``The feck o' my life.'' --Burns.