cachlwyth

Welsh

From cach (“shit”) +‎ llwyth (“load”), a calque of English shitload; compare tanllwyth (“great fire”) and trymlwyth.

cachlwyth m (plural cachlwythi)

(colloquial, vulgar) shitload
- 1978: Mary Wiliam, Dawn Ymadrodd, page 13 (Gwasg Gomer)
  A hynny a roddodd fod i Bachlwyth cachlwyth. Nid yw bellach yn cael ei gyfyngu i’r cae gwair; mae’n cael ei ddefnyddio i ddisgrifio unrhyw lwyth neu bentwr blêr, neu sy’n ormod o goflaid[.]
  (please add an English translation of this usage example)

Mutated forms of *cachlwyth*
radical	soft	nasal	aspirate
cachlwyth	gachlwyth	nghachlwyth	chachlwyth

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.