G

[grand slam]  {n.}

A home run hit when there are three men on the bases.

[grandstand]  {v.},  {slang},  {informal}

To show off, to perform histrionics needlessly.

[grandstander]  {n.},  {slang},  {informal}

A showoff, a person who likes to engage in histrionics.

[granted]

See: [TAKE FOR GRANTED].

[grasp at straws] or [clutch at straws]  {v. phr.}

To depend on something that is useless or unable to help in a time of trouble or danger; try something with little hope of succeeding.

* /To depend on your memory without studying for a test is to grasp  […]

[grass]

See:

[LET GRASS GROW UNDER ONE'S FEET],

[SNAKE IN THE GRASS].

[grasshopper]

See: [KNEE-HIGH TO A GRASSHOPPER]

[grass is always greener on the other side of the fence] or [grass is always greener on the other side of the hill]

We are often not satisfied and want to be somewhere else; a place that is far away or different seems better than where we are.

* /John  […]

[grave]

See:

[ONE FOOT IN THE GRAVE],

[TURN IN ONE'S GRAVE] or [TURN OVER IN ONE'S GRAVE].

[graveyard shift]  {n. phr.}

The work period lasting from sundown to sunup, when one has to work in the dark or by artificial light.

* /"Why are you always so sleepy in class?" Professor Brown asked Sam. "Because I have to work the graveyard shift  […]