a sexual act involving at least three men. Similar to an orgy where many, many, many, many gay men pile on top of each other during sexual penetration for euphoric orgiastic pleasure. Known as a manweave because of the weaving action of the anal penetration (like weaving a wicker basket) between the several male partners involved. Lesbians with strap-ons have also been known to perform this act.
Me and my friends did a 5,000 man manweave that started in Detroit and ended in Baltimore. Man we sure weaved up those dudes.