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2.
A sudden, extremely urgent need to defecate.
From "Whose Line is it Anyway" (Scenes From a Hat) 'Adults still experiencing the Terrible Two's'. : "Jim, I've made a decision about that promoti-- *GASP* Ooo!... *hobbles towards restroom*" (struck by the Terrible Two's mid-sentence).
by Nico0885 May 23, 2012
 
1.
No matter how old this kid is, they are always in their Terrible Two's when you have to babysit them.
Oh, you'll have to bear with Melanie - she's in her Terrible Two's.
by Angelacia May 22, 2007