Slang for Word or Phrase That's Hard to Pronounce

This page is the CodyCross answer for the clue below from Prehistory, Group 1247, Puzzle 4 (Burrup Peninsula).

Question is: Slang for Word or Phrase That's Hard to Pronounce

and the answer is: MOUTHFUL

Word Meaning:

MOUTHFUL — The amount that will fit in a mouth.

Definitions from Wiktionary.