PRATFALL
blunder, blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boner, boo-boo
(noun) an embarrassing mistake
pratfall
(noun) a fall onto your buttocks
Source: WordNet® 3.1
Etymology
Noun
pratfall (plural pratfalls)
A fall onto the buttocks.
A humiliating mistake.
A staged trip or fall, often for comedic purposes.
Synonyms
• (a humiliating mistake): blunder, howler
Verb
pratfall (third-person singular simple present pratfalls, present participle pratfalling, simple past pratfell, past participle pratfallen)
To fall on to the buttocks.
Source: Wiktionary