Noun
Something that yields a substantial additional benefit; something that figuratively kills two birds with one stone.
The fashion of wearing long sleeves outside a short-sleeved shirt.
A cabling device used in theatre, allowing two stage lighting instruments to be connected to one dimmer.
Source: en.wiktionary.orgAs James suspected, his cricket writings may have done as much for West Indian independence as his well-known political writings, including The Case for West Indian Self-Government (1969) and David Foster Wallace’s Tennis Writings It’s a twofer! Source: Internet
His curated list includes 14 philosophers, with just three women and three non-Westerners (Sei Shōnagon being a twofer). Source: Internet
I still think it's important that no one voting think they're getting a twofer, no matter who they are voting for. Source: Internet
Then there is Biden’s treatment of Anita Hill -- a twofer that offends more than one group of voters he needs. Source: Internet