Something that is pleasing in a greatly amusing manner. Derives from the word fantastic, meaning fantasy-like, only to exist in dreams or the imagination, and the accronym ROFL, which stands for Rolling On the Floor Laughing.
person 1: Say, Pete, did you see that there's a banana hammock sale going on at the Salvation Army?
person 2: Rofltastic!
person 1: That n00b Olly went out with a transvestite he met online!
person 2: Rofltastic!
Basically, roflcopter, except with "tastic" instead of "copter". the "tastic" doesn't really mean anything, but it has been translated before as an acronym for "tactical assault squad turtles in corporated." the "in corporated" is used in two seperate words, since "incorporated" would only be used for the "i"
Legolewinsky: Did you see that episode of "South Park"
Bouchey: Yeah, it was rofltastic!
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.