when you place your flaccid to semi-erect penis in between a partners swampy butt cheeks. generally done in the morning before a shower or after a long hot day. named after 'Semotilus atromaculatus' or the creek chub, a species of minnow.
One or more people who own a boat that load it down with as many people as possible and blast rave style music at every raft up. (Females are usually put on the boat by force)