[touch up] {v.}
1. To paint over (small imperfections.)
* /I want to touch up that scratch on the fender./* /The woodwork is done, but there are a few places he has to touch up./
2. To improve with small additions or changes.
* /He touched up the photographic negative to make a sharper print./* /It's a good speech, but it needs a little touching up./
3. {slang} To talk into lending; wheedle from.
* /He touched George up for five bucks./