We found 9 dictionaries that define the word pie hole:

General (4 matching dictionaries)

1. pie hole: Merriam-Webster
2. pie-hole, pie-hole: Collins English Dictionary
3. pie-hole: Wordnik
4. pie-hole, pie hole: Wiktionary

Business (1 matching dictionary)

5. Pie hole: Legal dictionary

Computing (1 matching dictionary)

6. Pie hole: Encyclopedia

Medicine (1 matching dictionary)

7. Pie hole: Medical dictionary

Slang (2 matching dictionaries)

8. pie-hole: English slang and colloquialisms used in the United Kingdom
9. Pie Hole, pie-hole: Urban Dictionary

Definitions from Wiktionary (Pie hole) ▸ noun:  Alternative spelling of piehole [(slang, offensive) A person's mouth.] Similar: piehole, cakehole, spithole, facehole, cookie hole, pussyhole, peehole, hole, bung-hole, bumhole, more... ▸ Words similar to pie hole ▸ Usage examples for pie hole ▸ Idioms related to pie hole ▸ Wikipedia articles (New!) ▸ Words that often appear near pie hole ▸ Rhymes of pie hole ▸ Invented words related to pie hole