What is a "u haul" in gay sex?

Humorous term to describe a Lesbian who is always in love, out of love..

Definition

U-Haul is also a popular rental outfit, for trucks, and trailers, for those moving themselves.

One supposes that is how the nickname came about.

Also used in North American culture, as a joke within the Gay Community, that it is a truck a Lesbian brings on her second date with another Lesbian, based on the concept that Lesbians fall into love on the first date, move in on the second date.