Abbreviation
onomatopoeia or kinda
Body parts
Kind of people
Various
100

BFF

Best friends forever 

100

boo-boo

a minor injury

100

head over hills

madly in love

100

have two left feet

Be clumsy

100

kiss the cook

a sign of satisfaction with your meal.

200

FYI

For your information

200

yucky

messy or disgusting.

200

let one's hair down

to relax; behave informally.

200

name dropper

a person who seeks to impress others by frequently mentioning famous or important persons in a familiar way.

200

spitball

a piece of paper that has been chewed and shaped into a ball for use as a missile.

300

ROFL

Rolling on the floor laughing

300

zoom (zoom-zoom)

move or travel very quickly

300

by the skin of my teeth

a situation from which one has barely managed to escape or achieve something; a close call.

300

Eager Beaver

An exceptionally zealous person, one who habitually takes on more tasks or works harder than others

300

play possum

pretend to be asleep or unconscious (as an opossum does when threatened).

400

DMV

Department of Motor Vehicles

400

clickety-clack

a rhythmic usually fast click-clack. the clickety-clack of the wheels along the railroad track.

400

have a chip on your shoulder

to hold a grudge or grievance that readily provokes disputation.

400

arm candy

a sexually attractive companion accompanying a person, especially a celebrity, at social events.

400

censor dodge

Making a word that is censored, (typically swears) un censored by changing a small detail.

500

ONO

or nearest offer (торг уместен)

500

yada-yada

boring or empty talk

500

chopped liver

 a person or thing regarded as insignificant.

500

brown noser

an extremely obsequious person

500

burst someone's bubble

to say or do something that shows someone that their beliefs are false, or that what they want to happen will not happen