1º_ In lunfardo it is "to have a sexual encounter without reaching intercourse", only with kisses, hugs, caresses, . . . At one time it was said "squeeze", and perhaps they are associated since the Italian verb from which 'chapar' comes is acchiappare ("to take, to grasp, to squeeze against one"). 2º_ Another meaning more adjusted to the etymology is "take, snatch". See fratacho ( lunfardo ) .
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