pencil (someone/something) in

to have a temporary plan to do something with someone.

The team had penciled in Morton as a key player this season.

I penciled you in for lunch next Thursday.

Etymology: based on the idea that a pencil mark can easily be removed or changed

• hard put to do something
• hard row to hoe
• hard sell
• hard stuff
• hard to swallow
• hard to take
• hark back to
• hark back to something
• harm a hair on head
• harm a hair on someone's head
• harp on
• harp on something
• has-been
• has got game
• hash out
• hash out something
• has more bark than bite
• Has the cat got tongue?
• Has the cat got your tongue?
• hatchet job
• hatchet man
• hate guts
• hate someone's guts
• hat in hand
• hats off to