smash and dash

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smash and dash (third-person singular simple present smashes and dashes, present participle smashing and dashing, simple past and past participle smashed and dashed)

1. (slang) To have sex and leave immediately afterwards.

• hit it and quit it
• hump and dump
• jump and dump

smash and dash (plural smashes and dashes)

1. (slang) An act of sex after which one immediately leaves.

   I'm not looking for a long-term relationship: I'm okay with an occasional smash and dash.

• dine and dash
• hit and run
• wham, bam, thank you ma'am