verb.
To insert an erect penis into the vaginal canal of a trans-woman.
etymology:
Derived from euphemism for sexual intercourse: "lay pipe". As the trans-woman's vagina is surgically formed from her former penis, intercourse is, effectively, the insertion of one penis into another. Hence, "pipe-fitting".
"That girl Jamie? Turns out she used to be a James. We did a bit of pipe-fitting."
