What is Mother-shut-your-mouth?
1.
A way to say 'mother fucker' without being offensive and vulgar.
Suppose you're with your grandma at her usual bing spot. One of the elderly spills his drink all over your back. You yell "Mother-" but catch your felf and say "Mother-shut-your-mouth". You are now the sweetest person for not cursing.
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1.
Variant of a dirty sanchez where a piece of fecal corn is visible. For best effect the moustache should resemble the style worn by Adolf..