The word(s) "boaster" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Pickthal translation.

(1) Turn not thy cheek in scorn toward folk, nor walk with pertness in the land. Lo! Allah loveth not each braggart boaster.

(سورة لقمان, Luqman, Chapter #31, Verse #18)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) That ye grieve not for the sake of that which hath escaped you, nor yet exult because of that which hath been given. Allah loveth not all prideful boasters,

(سورة الحديد, Al-Hadid, Chapter #57, Verse #23)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)