A sex move popularized by the Alaskans in the early 1900s. To perform this move, one must take a shit and freeze the turd. Once the turd is solid, one must insert the turd into their lover's desired point of entry.
"Hey honey, I'm really in the mood for sex, shit, and a cold temperature. Anything in mind?" "2 words. Alaskan Pipeline."
Straight piping is an aggressive form of deep throat oral sex. This is when a girl lays on her back on a bed (or some other object) and tilts her head back over the edge so her throat is no longer at an angle. In effect, it forms a "straight pipe." Often seen in pornography.
Yo man I banged this girl last night, she was like a pornstar dude! She even let me straight pipe her!