show-off

(noun) a person who displays his or her achievements or good characteristics to make others feel bad

Example Sentence:

A: Do you like your new roommate?
B: No! He has a beautiful girlfriend, a nice car, good looking friends and really nice stereo system. He brought them all over last night to see his new place.
A: Wow, your roommate is a show off!

The young skateboarder enjoyed being a show off because it made all of his friends jealous of his skateboarding abilities.

Similar idioms:

1. show off
2. show someone’s true colours
3. blow one’s own horn
4. toot one’s own horn
5. show off
6. bad apple
7. jump out of one’s skin
8. put up with
9. homesick
10. show someone the ropes
11. check out someone
12. set of wheels
13. stop in
14. stop by
15. bring up