I am notorious (well notorious only to myself) for putting placeholders in manuscripts when I can't think of the right words. 

Lauri Meyers Childrens Writer
Maybe I need to schedule a brain massage?
photo by Julia Freeman-Woolpert via sxc.hu
I allow myself thirty seconds to come up with the perfect phrase. If I don't succeed I leave stage directions to follow later. 

Stopping for too long causes a break in my flow which leads to picking my nose, eating a few donuts, changing the laundry, and then remembering I was writing several hours later. 

My current selection of placeholders includes:

"in the hallway something frickin' hilarious ensues"

"name that is sweet and rascally"

"funny sound an orange would make"

"eats something grosser than a caterpillar, but not as gross as a tarantula."

"mom gives her incentive so she has to win"

"The octopus' arm falls off or some other very bad thing happens"

"XXX"  (I am trying not to use this anymore, because I kept inserting kissing scenes which was awkward in a picture book)

Smart writer type people say to write your best idea down in the moment, even if you know it needs to change.  There are times the best I can do is gobbley gook, so the placeholder has to do the job.  (Hey, would you read a story about gobbley gook that took over the world?  Hmm.  Where's the donuts?)

HELP NEEDED!   In the comments won't you please help me replace my placeholders with something better?  What sound would an orange make?  What is something bad which would happen to an octopus?