A celebration of sexual congress lasting at least two days. Primary festivities include sex, oral sex, hand jobs, and grinding (although this is far from a complete list).
Man, I got like 9 bitches coming down to the beach house for spring break. It's gonna be a god damn sextravaganza!
3. An exceptionally complex setup made for the purposes of having sex.
1. "That chick is so hot, she's sextravagant."
2. "Last night was sextravagant, babe."
3. "When I entered the room, I saw that he had lit candles, put on some really good mood music, and scattered real rose petals everywhere! It was so beautiful and sextravagant!"