to show off in Polish:

1. popisywać się

Polish word "to show off"(popisywać się) occurs in sets:

Ogólne słownictwo 5/5 (Stanag 6001 Level 3)
Phrasal verbs with OFF 3.9 - 3.10
2. STANAG 6001 level 2 - Money (English file - int...
Egzamin - Słówka podręcznik
1st June, Wed (group A)

2. popisać się

Polish word "to show off"(popisać się) occurs in sets:

Iwka 26th July 2016 (1 hour)
Kasia 16th Feb (95 min)
Aneta 1st Feb 2016 #1
kasia 12th Now 2013
Marta 6th Oct 2016