knocking boots

Getting physically close

Knocking boots is slang for having sex.

The phrase evokes the image of boots knocking together during intercourse, though the exact origin is unclear.

It became widely known through hip-hop in the 1990s: They've been knocking boots for months.

The expression is playful rather than crude.

Related

getting it on · intimacy · euphemism · lovemaking · sleeping together · informal · intercourse · horizontal tango · mattress dancing · hanky-panky · slang · coupling · getting busy · bumping uglies · making whoopee · humor · playfulness · metaphor

Opposites
sexual activity

knocking bootsabstaining

Voluntarily doing without

celibacy · abstinence · chastity · holding out

physical intimacy level

knocking bootshands off

Forbidding contact or meddling

no touching · just friends · sleeping in separate beds · cold shoulder

Family

knock, knocking, knocked, knocks, knocker, knockers, boot, boots, booted

Familiarity
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Timeless · Everyday, not technical · Rated R