double up

En español: hacer las veces

1. To double the quantity, amount or duration of something. (transitive) · I'm going to double up my enlistment.
2. To double one's number of chips, especially in poker by winning an all-in pot. (intransitive)
3. To bend, bend over; to fold; to stoop. (intransitive) · Near-synonym: double over
4. To cause (someone) to bend over; to beat up (someone). (transitive) · I doubled him up with a swift punch to the stomach.
5. To have a secondary use. (intransitive) · This unfolding sofa doubles up as a bed.
6. To get the second out in a double play, typically referring to getting an out by beating a runner back to a base (often by throwing) after a fly ball has been caught (transitive) · Jones snared the liner and then stepped on the bag to double up the runner.
7. To employ double the usual resources for a particular purpose; to work in pairs. (intransitive)
8. To marry or live with someone; to share a living space. (intransitive, slang)