One who strums a stringed musical instrument.(noun)
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Use "strummer" in a sentence
"Creators can even print out their Flattr codes and stick it on a real world thing, like a tip jar, graffitti art or a sidewalk strummer's guitar case, so that people with the smartphone app can Flattr the physical world too."
"I believe strummer broke up his pub band after hearing them and started a punk band."
"FAIL! strummer your taking this internet thing a little too seriously."