Some appropriate words to use in conversations dealing with the subject of our affection:

all-time favourites:

His Hugoness
thud

Complete list (in alphabetical order):

-A-

ack
added whimper effect
Agent-like
Anything you can do I can do better
automatic drool response

-B-

baby oil
blush

-C-

cackle
*censored*
chest hair
cute little bum

-D-

dammit
dies
dreamy look
drool
doom
down under

-E-

ecstatic convulations
eyebrows

-F-

faints
Full Throttle Cute Mode

-G-

go me/us/you
goes to Australia
growl

-H-

hairline
His Hugoness
Holy Can Opener
Hugo-esque

-I-

instantaneous ovulation
involuntary ovulation

-J-

jawline

-K-

ker-sploosh
ker-thud

-L-

las deir-ty girls
leather jacket
lips
long dark hair

-M-

melt
Mind Blowing Agent Sex
Mordor

-N-

nice body

-O-

OOOoooo
our (as in our Hugo)

-P-

pants
pointy ear
ponytail

-R-

ravishing ravenhair
rivendelicious

-S-

sandalwood
shades
sigh
smirk
snicker
snort
spontaneous ovulation
subway scene
swoon

-T-

thud
Twister (the game, lol)

-U-

unbelievable

-V-

voice

-W-

waggles eyebrows
whoo hoo
whumph

-X-

xenophobe (Agent Smith hates humans)
xenaphile (Agent Jones likes Xena)

-Y-

yummy

-Z-

zipper

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Thanks to Tanathir for starting this list. And to all the other wonderful fellow hugonuts working so hard on its perfection ;-) Anything to add? Let me know!