Male (esp. masculine) body odor—typically used in sexual contexts.
1993 August 16, John Dorrance, “The coldest winter I ever spent was the summer of '93 in LA”, in soc.motss[1] (Usenet):
Boy, I can't believe how hot it is in here! I wish this place had windows... (Bob fans his shirt, circulating his manscent throughout the room, and looks at Sim smoulderingly.)
1997 September 18, Telegraph Raven, “Does anyone like shaved your pubes?”, in alt.support.jock-strap[2] (Usenet):
Besides, without pubes, there's nothing to hold the manscent.
1997 September 13, w...@why.not, “Four Cowboys”, in alt.sex.stories[3] (Usenet):
"Take a deep breath," Bruce ordered in his western cowboy accent. Megan did so. It was amazingly difficult to do; she was almost being suffocated. A lungfull of musky, sweaty manscent entered her, nearly making her gag.