1.
If you say that someone is showing off, you are criticizing them for trying to impress people by showing in a very obvious way what they can do or what they own.
All right, there’s no need to ~...
PHRASAL VERB: V P disapproval
2.
If you ~ something that you have, you show it to a lot of people or make it obvious that you have it, because you are proud of it.
Naomi was showing off her engagement ring...
He actually enjoys his new hair-style and has decided to start showing it off.
PHRASAL VERB: V P n (not pron), V n P
3.
see also show-off