don't teach your grandmother how to milk ducks
Alternative form of don't teach your grandmother how to suck eggs.
grandmother
UK /ˈɡɹæn(d)ˌmʌðə(r)/ US /ˈɡɹæn(d)ˌmʌðɚ/
noun 3
Definitions
noun
1
A mother of someone's parent.
[…] man may admit that his grandfathers and grandmothers were mon[keys a]nd monkeyesses if he want^([sic]) to; that is his privilege.
"It's a nightingale floor," our grandmother told us. "It warns us of thieves in the night."
2
A female ancestor or progenitor.
3
In Amazonian shamanism and related contexts, a reverential name for the ayahuasca vine or brew, symbolizing its role as a wise, guiding spirit.
"Enter ayahuasca, the mystical grandmother of the psychedelic family, a beacon of profound spiritual experiences"
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