to describe a once indescribable extraordinary occurance which leaves people speechless and in awe. something which is as spectacular as butt sex.
bumfucktacular is arguably greater than fucktacular.
"Eli mannings escape from a sack, and then pass to David Tyree, AND THEN David Tyre's catch was the most BUMFUCKTACULAR plays i done ever seen!!!"
"yeah, eff them cheating Patriots. Go Dolphins! '72 represent"