Derived from the combination of the words gay and tendency. This word is used to describe an action, usually associated with homosexuality, that is committed repeatedly (a tendency). Plural: gendencies.
A guy that inserts a full ice cream cone into his mouth and sensually licks the ice cream as he removes the cone from his mouth. - wow, that's a gendency, Stephen.
Guys that always comment on how they would definitely beat you in an ass-to-ass challenge.
Girls that play lacrosse and guys that wrestled in high school.