I do believe they call them jugs, hooters, melons, and well whatever 
I've heard of jugs also referred to as:
bazookas (plural, slang, large breasts)
bazoomies (plural, slang, large breasts)
bee bite (slang, small breasts)
beer glass (plural, slang, large breast, from the set of champagne, wine, and beer glasses)
berthas (plural, slang, large breasts, from large German artillery gun in WWI)
big berthas (plural, slang, large breasts, from large German artillery gun in WWI)
big McDuffs (plural, slang, large breasts)
blouse bunnies (plural, slang)
boob (slang)
boobie (slang)
bosom (plural)
boulders (plural, slang, derived from “over the shoulder boulder holder” for “bra”)
brace and bits (plural, slang)
breast (anatomy)
bristols (British slang, one source claims from British WWI fighter aircraft called the Bristol Fighter, contracted to “Brisfit”, which rhymed with tit, while another source claims from the Bristol City soccer team)
bubbies (plural, slang)
bubs (plural, slang)
buds (plural, slang, small breasts)
buffers (plural, slang)
cantaloups (plural, slang)
cantaloupes (plural, slang)
champagne glass (plural, slang, small breast, from the set of champagne, wine, and beer glasses)
chi-chi (slang)
chubbies (plural, slang, large breasts)
coconuts (plural, slang, large breasts)
Dolly Partons (plural, slang large breasts, from the country singer)
double barrel (plural, slang)
Double Lotus Peak (plural, Taoist spiritual)
droppers (plural, slang, large breasts)
dugs (plural, slang)
dumplings (plural, British slang)
fun cushions (plural, slang)
globes (plural, slang, large breasts)
grapefruits (plural, slang, large breasts)
headlights (plural, slang)
hooters (plural, slang, large breasts)
hummers (plural, slang)
jugs (plural, slang, large breasts)
knobs ((plural, slang)
knockers (plural, slang, large breasts)
light and bitter (plural, British slang, a joke about a barmaid having the two main types of English beer tattooed on her breasts)
lungs (plural, slang)
mammary (anatomy)
melon (slang, large breast)
milk wagons (plural, slang, large breasts)
muffins (plural, slang, small breasts)
norks (plural, slang)
pair (plural, slang)
puppies (plural, slang, large breasts)
rack (slang)
ski slopes (plural, slang)
tabs (plural, slang, small breasts)
ta tas (plural, slang)
teat (the nipple, slang when applied to whole breast)
thirty-eights (plural, slang, large breasts)
thr’penny bits (plural, British slang)
tit (slang)
tittie (or titty)(slang)
twin mounds (plural, slang)
top bullocks (plural, slang)
tweeters (plural, slang, small breasts)
twin mounds (plural, slang)
twin peaks (plural, slang)
twins (plural, slang)
udder (downward hanging bag of cow, female goat, or other milk producing animals, slang when applied to human breasts)
voos (plural, slang)
wine glass (plural, slang, medium-size breast, from the set of champagne, wine, and beer glasses)
woofers (plural, slang, large breasts)
At least her(?) hands are dirty, very, very dirty.
