rollertoaster

Noun
Rollercoaster, only more mental.

Verb
Move, change, or occur in the dramatically changeable manner of a rollertoaster.

The last two weeks have been a real rollertoaster.

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Rollertoasted

The act of being drunk or stoned to the point of experiencing life as if riding a roller coaster.

Katie was so rollertoasted last night she walked around the party with her arms held up!