1. keep the wolf from the door - Verb
2. keep the wolf from the door - Phrase
(idiomatic) To ward off poverty or hunger.
They didn't earn much, but it was enough to keep the wolf from the door.
I'll grab a sandwich to keep the wolf from the door until dinner time.
(idiomatic, humorous, euphemistic) To delay sexual ejaculation.
Source: en.wiktionary.org