hide the monster

This is a slang term for the act of having sex.
inserting the penis in the vagina aka hiding the monster

hey what did you two do last nite.
oh we went down in the basement and played hide the monster.

by [e-mail] January 24, 2008

hide the sea monster

This is a slang term for sex in a hot tub.

Roy and Julie are in the Jacuzzi, playing hide the sea monster.

by K Joyce August 2, 2012