to not go to sleep until someone comes home
used for asking or telling someone to stop so that you can speak to them or walk with them
"Don't wait up for me," Kyle told his brother, starting toward Lianne.
Don’t wait up for me, I’ll be very late tonight.
If he's not there when we get in then you can go to bed and I'll wait up for him.
She had told Kirsty not to wait up for her; she could undress herself.
`Hey, wait up ," he called out, catching up with them at the foot of the stairs.
wait up
waits up
waiting up
waited up
There is no origin for this phrasal verb
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