lay pipe

• lay some pipe

The figurative sense is a jocular extension from the literal sense referring to the work of a pipelayer (a tradesperson).

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lay pipe (third-person singular simple present lays pipe, present participle laying pipe, simple past and past participle laid pipe)

1. Used other than figuratively or idiomatically: see lay,‎ pipe.
2. (slang, of a man) To have sex.

   Synonyms: hide the sausage, lay the pipe, have sex; see also Thesaurus:copulate

• pipelay