Jawblock is dated American slang for talking — specifically the kind of idle, extended talking that fills time without saying much. To jawblock was to chew the fat, to gas on, to fill the air with words. The jaw + block construction evokes the mechanical action of a jaw working like a block, grinding away. Rarely heard today but entertainingly vivid.
They spent the whole afternoon jawblocking on the porch instead of getting anything done.
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(US, _, slang, dated) To talk.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.