flex one's muscles in Russian
flex one's muscles in Russian
изгиба́ть мы́шцы
(literally) To tense and bend one's flexor muscles.
напряга́ть му́скулы
(literally) To tense and bend one's flexor muscles.
демонстри́ровать си́лу
(figuratively) To show off one's strength or skills.
игра́ть му́скулами
(figuratively) To show off one's strength or skills.