This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The rapid descent of an aircraft in a steep, spiral spin.

n. Informal A loss of emotional control sometimes resulting in emotional collapse.

n. The rapid, uncontrollable descent of an aircraft in a steep spiral.

n. A severe mental or emotional collapse; emotional breakdown.

n. Any sharp, sustained, often uncontrollable descent or decline.

n. loss of emotional control often resulting in emotional collapse

n. rapid descent of an aircraft in a steep spiral

"My theory on the tailspin is because the Indians are built around so many talented young players who found winning easy last year."

tailspins   

agitation    stunt flying    acrobatics    stunting    aerobatics   

tomisinformation    traumatism    doldrums    roller coaster    immiseration    pipe-dream