BITTER END

final completion of something (especially something that is potentially very painful or unpleasant)

Bitter end can refer to:The part of a rope that is tied off. See knot#Components.An expression the final stage, often death.The Bitter End, club in New York City.The Bitter End (song), a song by alternative rock band Placebo.The Bitter End (fanfic), an unusually well-known work of Ranma 1/2 fanfiction continuing the series to a tragic outcome.The Bitter End (album), the only release by Andy Hull's solo project Right Away, Great Captain!
See more at Wikipedia.org...

Noun
1. the final extremity (however unpleasant it may be); "he was determined to fight to the bitter end"
(hypernym) extremity
2. (nautical) the inboard end of a line or cable especially the end that is wound around a bitt
(hypernym) end
(part-holonym) line
(classification) seafaring, navigation, sailing

(See the bitter end)

Synonyms and related words:
Thule, Ultima Thule, bottom dollar, boundary, butt, butt end, catastrophe, climax, completion, conclusion, consummation, culmination, denouement, end, end result, extreme, extremity, fag end, farthest bound, final result, finale, jumping-off place, last act, limit, nib, payoff, point, pole, stub, stump, tag, tag end, tail, tail end, termination, tip,