FECK
Etymology 1
Noun
feck (plural fecks)
Effect, value; vigor.
(Scotland) The greater or larger part.
Verb
feck (third-person singular simple present fecks, present participle fecking, simple past and past participle fecked)
(Ireland, slang) To throw.
(Ireland, slang) To steal.
(Ireland, slang) To leave hastily.
Etymology 2
Verb
feck (third-person singular simple present fecks, present participle fecking, simple past and past participle fecked)
(euphemistic, chiefly, Irish) Fuck.
Synonyms
• eff, frak, frig; see also copulate or copulate with
Source: Wiktionary
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.
Source: Webster’s Unabridged Dictionary 1913 Edition