While "tiny teen bikini movie" is not the title of a single film, it likely refers to a of direct-to-video or late-night cable movies popular in the 1980s through the early 2000s. These films are often low-budget "sex comedies" or "softcore spoofs" that focus on beach settings, summer vacations, or outlandish parodies.
If you aren't looking for a spoof, your search might relate to these broader categories:
Also known as Teenage Cavegirl , it follows a modern woman transported back to a prehistoric era.
A sci-fi parody about two waitresses who travel through history. Classic Beach/Teen Subgenres
