great unwashed

a great deal

Very much; to a great extent; a lot; lots.

go great guns

To perform particularly well; to be particularly successful.

go to great lengths

To make a major effort; to be very careful when doing something, especially to an extreme or excessive degree.

great balls of fire

Expressing great surprise.

great beyond

the afterlife.

great deal

Large number, amount, or extent; profusion.

great job

well done; congratulations! (a praise for someone's efforts, possibly to a higher degree than good job!)

little strokes fell great oaks

Small but persistent efforts can lead to big results.