lucky Pierre
noun the man (or the woman) sandwiched between the outer layers of a sexually active threesome. Glorified in the following lyric: 'Pierre gave it to Sheila, / Who must have brought it there. / He got it from François and Jacques, / A-ha, Lucky Pierre!' (Tom Lehrer, 'I Got It From Agnes', 1953). Predominately gay male usage
US, 1942