He 'strummed' a tune on the guitar.
She 'strummed' the guitar/banjo.
(..) That's very sporting of you. - Cigarette? - No, thank you. - Fond of music, l see, eh? - Yes. l do a bit of strumming myself. Mostly boogie-woogie stuff. - What on earth are you going to do with all that? - Play it. - What, here? - Yes, l'm deputising for the orchestra pianist. (..)1947 Holiday Camp
(..) -My lady friend down at Monk's. You guys ought to see the way she works her nails across my back. She's a maestro... The crisscross... ...the figure eight, strumming the old banjo... ...and this wild, savage free-for-all... ...where anything can happen. I gotta get downtown and buy that suit. (..)1994 TvShow: Seinfeld Title: The Pie Season: 5 Episode 15
(..) that we're renting, please, like forgive me husband. I swear, we're not. I'm so embarrassed. I'm so embarrassed. (guitar strumming) (humming) - I don't want to be a witness. Have to call me in, subpoena me. - Like oh wow, our high school reunion. Babe. (..)2020 Home Stay