Tabooner
A Taboo Boner. When one of your family members or relatives give you an erection. Tends to happen when very horny, and/or family member wears very slutty clothes.
"So i walked in on my sister while she was changing, and i got a Tabooner."
"When i woke up in the morning and saw my dad hanging out in the nude, i got a Tabooner and we ended up having rough sex."