geek: someone who works too hard, is more intelligent than usual, and is slightly unattractive.
"Bill Gates is kind of a geek."

get it: to understand something.
"Sorry, but I just don't get it."

get naked [possibly offensive]: to completely relax and have a good time.
"Let's get naked tonight!"

glitch: flaw.
"There must be a glitch in this softwware."

go bananas: go slightly mad.
"This project is causing me to go bananas!"

gomer: a dumb person.
"Stop acting like a gomer!"

goof (1): a silly and foolish person.
"What a goof you are!"

goof (2): make a mistake.
I really goofed on the test today."

goof off (1): waste time.
"Stop goofing off and help me clean the house!"

goof-off (2): someone who wastes time and isn't serious.
"A
goof-off never does well in school"

goof up: make a mistake.
"Oh no! I really goofed up!"

goofy: silly.
"Kids always make me feel goofy!"

grabbers: hands.
"Have you washed your grabbers, Benjamin?"

grand: one thousand dollars.
"He's making over a hundred grand a year!"

grass: marijuana.
"Have you ever smoked grass?"

grub: food.
"Where's the grub?!"

grubby: not clean.
"I always feel grubby in the morning."

grungy: unclean and stinky.
"Grungy people are not allowed in Dave's house!"

gut: a person's stomach; belly.
"Dave is getting a big gut because he loves chocolate ice cream and beer!"

guts (1): courage.
"It took a lot of guts to ask his boss for a raise."

guts (2): the nature of something.
"Let's get to the guts of Dave Sperling!"
