To snow under is to give somebody far more work than they can manage. Snow under with requests.
It is nearly always passive, since people report being snowed under rather than doing it. The picture is of being buried rather than merely busy.
1phrasesnow underTo give somebody far more work than they can manage.
“One announcement was enough to snow under the whole department.”
snow under is a phrase.
Practised in Phrasal Verbs