Slang for “making love”. Ernest Hemingway used the word on at least two occasions, when advising a friend who admitted to being a virgin and in his poem “The Soul of Spain ...” in reference to aunts. The word was used by Hemingway in the late 19th and early 20th centuries.
“It isn’t right to yence your aunts”. Ernest Hemingway, 1923, from the poem “The Soul of Spain with McAlmon and Bird the Publishers”
by Dimlywanes August 25, 2018