septuple-fourth-cousin

Septuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and fourteen great-great-great-grandparents in common.

My septuple-fourth-cousin is a good person.

fourth cousin-niece

Fourth cousin's daughter.

My fourth cousin-niece is a good girl.

fourth-cousin-2X-removed

Fourth-cousin-twice-removed (4C2R).

My fourth-cousin-2X-removed is a good person.

fourth cousin-nibling

Fourth cousin's child.

My fourth cousin-nibling is a good person.

Fourth of July

The day of explosions, FREEDOM, more explosions, 'Murica, grilling, more grilling, and most importantly...
...EVEN MORE EXPLOSIONS!

Demoman approves of the Fourth of July.

fourth-cousin-7X-removed

Fourth-cousin-seven-times-removed (4C7R).

My fourth-cousin-7X-removed is a good person.

Fourth-Wall Syndrome

A condition where a fictional character is able to beat the fourth wall, but their meta-awareness becomes debilitating. They will often lose their grasp of the fictional world they live in as they become obsessed with the fourth wall. Other side effects can include but are not limited to, lashing out at the audience, losing awareness of their own fictional world, stress, emotional distress, Borderline Personality Disorder, Depression, etc.

This character, suffering from Fourth-Wall Syndrome, despised his creator, blaming her for every bad thing that ever happened to him.