when (someone) was a (mere) twinkle in (their) father's eye

humorous

at a time before someone was born.

All this happened a very long time ago, when you were a mere twinkle in your father's eye.

• too bad
• too big for boots
• too big for your boots
• too close for comfort
• too close to call
• too for words
• too good to be true
• too hot to handle
• too little, too late
• tools of the trade
• tools of trade
• tools of your trade
• too many chiefs
• too many chiefs and not enough Indians
• Too many cooks .
• Too many cooks spoil the broth.
• too much of a good thing
• too something for words
• top brass
• top dog
• top-drawer
• top-flight
• top flight
• top it all
• top it all off