Sentence 093: Stick Up For, To Show Up, It's Just As Well

Don't let your colleagues mob you like that. Stick up for yourself!
Don't always show me up by wearing these worn-out suits and having your hair dyed with neon colours whenever we go out together.
It's just as well that you did not watch that game, it was a horrible performance.

- Show up here is used with the meaning: Embarrass someone in front of others
- "It's just as well" = "It's lucky that", maybe British English